I have a table where the key is an autonumber. I also have a field which holds the reference of a room eg 0BM1. It is nvarchar. Is there a way I can set this field to duplicates = No, so that my user cannot enter the same room reference more than once. Or do I have to do this check in my asp.net code ?
TIA
I have created a view based on joining 3 tables, however, it is not possible to have a unique field in the view which I must need it and I must create index on some other fields. Is there any way to create sequence number or uniqie field in mssql view.
View 13 Replies View RelatedI have a bit field only alow one row as 1 all other rows should always 0.
How can I control that -- trigger or constraint?? How?
I have a database table with a primary key that auto-increments - using MS SQL Server 2000.
However I have another field (standard field) that must not allow duplicates.
Besides writing code to sift through the database every time to check for duplicates (which would take long to search through the db every time), is there any setting in MS SQL Server 2000 that allows for an automatic check for duplication and will prevent duplicates!??
I have a database table with a primary key that auto-increments - using MS SQL Server 2000.
However I have another field (standard field) that must not allow duplicates.
Besides writing code to sift through the database every time to check for duplicates (which would take long to search through the db every time), is there any setting in MS SQL Server 2000 that allows for an automatic check for duplication and will prevent duplicates!??
Here's an example of what I mean...
PK Entry_Sheet Cust_Id Date
1 62345 cust1 16/11/2004
2 45663 cust6 16/11/2004
3 82917 cust1 16/11/2004
4 19283 cust2 17/11/2004
5 28764 cust2 18/11/2004
I have everything created, with data already in the table. What I need now is some way to prevent duplicates from occurring.
The Entry_Sheet value needs to be unique. Instead of writing code to run through the entire db each time an insert is performed, is there a simpler way using a SQL Server DB!??
I have built a table called Visit_Fact, which is detailed medical data. Within this table I have to create several index fields.
Well one of the fields ([Diag Code]) that should be included will have null values.
Well in Access I was able to build my new field called IndKey which has the following SQL statement:
IndKey: [PracticeCode]&[Physician Code]&[Chart #]&[Visit #]&[InsCoNum]&[CPT]&[Modifier]&[Units]&[Diag Code]
1. Example data with Diag Code = null
ABCD1234ABCDEF1234567MEDI19921301
2. Example data with Diag Code <> null
ABCD1234ABCDEF1234567MEDI19921301708.1
This runs fine in Access and if the Diag Code is null, Access does not care, it still puts all the other information together. Such as the examples above.
Well I tried doing this in a Stored Procedure and when I ran across a record that had a null value for the [Diag Code] it made the IndKey field Null for that record. If it was not null then it looked like Example 2.
What is the proper way of creating my unique field in SQL Server?
Hello,
I would like to store some frequently asked questions in a database.
As those questions/answers could be translated in several languages, I was thinking of using two tables :
The first table would contain a unique field : the key wich is an id for each faq.
The second table would contain those fields :
FAQ_ID : foreign key
LANG : language
QUESTION : the question translated in the good language.
ANSWER : the answer translated in the good language.
What I find embarrassing, is that first table just contains a unique field : the id. But it allows :
- to have a table in which a line correspond to an object. It is convenient for object relational mapping.
- it is more evolutionary. If, in the future, I have to add some statistics that concerns a faq, I will have the possibility to store them in the first table, avoiding in this way to duplicate data.
But, one more time, I find a bit embarrassing having a table with a unique field...
What is your opinion about that ?
Thank you in advance for any suggestion.
mathmax
Is it possible to have the field as a unique key and a optional one?It is like.. for example, office code has to be unique (cannot beduplicated with the same code) and it could be null too.
View 1 Replies View RelatedI am new to MS SQL and I was wondering is it possible to create a table with unique rows?? By this I mean if a table has two columns then a duplicate row would be if BOTH columns matched two columns of another row.
Thanks
I need to to have a table that has a counter field (used to generate an id code for a record). This is not the primary id for the field but just a counter to label a record in another table, similar to a registration code for an event. This is a sequential counter that will start 1 and go up on each new record inserted into other tables. What I want to do is be able to query this counter table to get the next valid number and increment the count for the next time. This is a multi user web app so needs to prevent duplicate use of same number.How best should this be handled? A transaction to query and update the field?
View 6 Replies View RelatedI have a table in Access 2007 that has about 30 field names and I want to have a count of how many unique rows there are in each field. I want to have these results put into another table that will just have the field name and then the count of how many unique rows there are.
I have code in VBA that will loop through my SQL and change out the field name, but I can't seem to get the SQL right before I can start looping it. For just one field name this would be what I have to count the unique names...
So far I have this:
INSERT INTO newtable
COUNT(*) FROM (SELECT Raw_Table.FieldName, COUNT(Raw_Table.FieldName) AS CountOfFieldName
FROM Raw_Table
GROUP BY Raw_Table.FieldName);
And its not going too well.
SQL 2000 Enterprise Manager won’t let me drop a unique key index and move it to another field. I get an error regarding ‘drop index not allowed because of unique key constraint enforcement.
Is there anyway to change fields for unique keys in SQL Enterprise Manager?
Thanks, Al
I created a view that joins two tables (tblOrder and tblProduct). The fieldProductID is common to both. When I save the View I get the following errormessage: "Column names in each view must be unique." Is there a way aroundthat? Should I be naming my Key Fields and Foreign Key fields differently?I'm new to MS-SQL. Thanks for your help.Louis
View 2 Replies View Relatedhello guys,
I have one table which is using to keep 10 difference type of serial number (that mean i got 10 column in the table). Is there any way to do unique key checking (individually, not combine) on these 10 serial number without sacrify the performance?
thank you.
I am trying to populate a field in a SQL table based on the valuesreturned from using substring on a text field.Example:Field Name = RecNumField Value = 024071023The 7th and 8th character of this number is the year. I am able toget those digits by saying substring(recnum,7,2) and I get '02'. Nowwhat I need to do is determine if this is >= 50 then concatenate a'19' to the front of it or if it is less that '50' concatenate a '20'.This particular example should return '2002'. Then I want to take theresult of this and populate a field called TaxYear.Any help would be greatly apprecaietd.Mark
View 2 Replies View RelatedHi all,I might be getting this all wrong but bear with me.
I need to create some kind of Unique field in my DB that is
nonsequential. This is because I need it to be difficult to guess
ids if you have an example in front of you.I have looked at
8digit EAN codes which include a check digit system.( I use a base digit of the row_id for these) Can anyone tell me
how many uniques I can get out of this system?For my ID: I have looked at something along the lines of:
Hex(row_id) + "T" + Hex( Trimmed(EAN)
)
The "T" serves to split the numbers for when I am converting back.
So for example:row_id EAN_code Hex(row_id) + "T" + Hex( Trimmed(EAN) )
------------------------------------------------------------------------------------------
3166 00031663 C5ET7BAF
3167 00031673 C5FT7BB9
3168 00031686 C60T7BC6
Is this too easy to guess (once you can tell there are two hex numbers there?)
What do people think?
Thanks,Pete
I am attempting to create a unique constraint on an nvarchar field named theology (it is not the primary key field)
that allows nulls. The table contains multiple rows with the value of null for
field theology. The documentation says one can create a unique constraint on a
field with all unique value except for null. Here is the error message:
'testtable1' table
- Unable to create index 'IX_testtable1'.
ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]CREATE UNIQUE INDEX
terminated because a duplicate key was found. Most significant primary key
is ''.
[Microsoft][ODBC SQL Server Driver][SQL Server]Could not create constraint. See
previous errors.
Any ideas? I am creating a unique constraint and not a unique index. Is there
some other database option to set to allow this?
.
im running an INSERT statement and I need one of the fields (RecordID) to be automatically generated.
Its a unique identifier type.
INSERT INTO swdata.dbo.Reports_PI
(RecordID , SD1AverageSCResTime
)
VALUES
(,xxxxxxxxxxx
,@SD1AverageCallResolutionTime
,@SD2CountAllCalls
,@SD3PercentClosedIn24Hours
)
Is there a keyword or value I can put in xxxxxxxxx that will automiatically generate a unique identifier as the record is created?
Thanks,
I am in a situation where I need to find out unique field names with different values in a table having 200+ columns.
Let's say I have two rows with 200+ columns ( I exported these rows from Lotus Notes to SQL Server) I am not sure what columns makes unique of these rows. It's going to be tedious by checking each column values.
Is there anyway I can write a squl query on these two rows which outputs column names which are having unique values.
I would appreciate If anybody gives me hint about achieving desired result
I am working on a software primarily related to accounting with visual basic
Many of the problems and proposed several solutions for running sum, but I have read almost all of these interpretations,
have applied when running sum is a unique ID field. but almost all of the functioning of accounting reports are in chronological order. So he questioned what was the balance on 05.05.2012.
ID of the process is done, if the user enters a process backward a few things since then, the transaction date is old, but the ID is new, are experiencing problems. eg
ID DATE DEBIT CREDIT BALANCE
1 02.02.2012 100.00 0.00 100.00
6 04.04.2012 0.00 150.00 -50.00
3 02.05.2012 70.00 0.00 20.00
4 02.05.2012 80.00 0.00 100.00
2 06.06.2012 120.00 0.00 220.00
must balance the figure above.
if ID = 2 record, the record date 06/06/2012 and if the ID = 6, date 04/04/2012, the date the order is made if the listing is experiencing trouble getting balance. 2 records in the same day when the balance at worst formula breaks down. The big point is that I hang out in my project.
the only solution is to use a temporary table or writing about it in Visual Basic seems to calculate. the use of temporary table is not a solution, but unfortunately also very fast.
I have a very large CSV file containing name-and-address information which I am reading in a Visual Basic project using the Microsoft.JetOLEDB.4.0 provider.
The key field on which the CSV file is to be filtered is the PostCode field. This is a UK-format PostCode "XXnn Nxx" where "XX" is one or more letters denoting a geographical area within the UK and "nn" is one or more characters (starting with at least one numeric digit) which when combined with the area code denotes a specific district within the geographical area. My aim is to identify all the unique UK postal districts held within my address CSV file.
Because I do not know how to use SQL to filter on the partial contents of a database field I am presently reduced to extracting unique full PostCodes using "SELECT DISTINCT PostCode,City,County FROM [ADDRESSES.csv]" into a DataTable object, then sequentially reading that DataTable using the operation of a dictionary object to identify unique PostCode areas, to finally construct the DataTable I need.
Is it possible in SQL to select records where the value of a varying number of characters before a space character in a given (PostCode) field is unique?
I have created the companyid as Primary Key.How to create a unique secondary index on Company Name. To avoid inserting duplicate records in database with the same companyname. I m creatin database in sql server 2005 with asp.net C# 2005. I know one way is write the query if not exists at the time of insert.But,i want to know is there anyother way to make a unique secondary index for the companyname on the company tablethanxs
View 1 Replies View RelatedHi there,I am trying to create a UID that is unique within my SQL Server. There are many users accessing the Server in seperate databases, but then I want to combine all the data from these tables, keeping the ID from each one as a primary key. I have written the following function, but when i call it as a default value for a field, it does not produce a unique number. CREATE FUNCTION GETNEXTID(@CURDATE DATETIME)RETURNS BIGINTASBEGINRETURN (SELECT CAST(CAST(DATEPART(YY,@CURDATE) AS VARCHAR) +RIGHT('0' + CAST(DATEPART(M,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(D,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(HH,@CURDATE) AS VARCHAR),2) +RIGHT('0' + CAST(DATEPART(SS,@CURDATE) AS VARCHAR),2) +RIGHT('00' + CAST(DATEPART(MS,@CURDATE) AS VARCHAR),3) AS BIGINT))END Can anyone help?
View 2 Replies View RelatedDoes anybody know the significance of 3 in the following error message?
"CREATE UNIQUE INDEX terminated because a duplicate key was found for index ID 3. "
Thank you
Hello.
Could anyone tell me why it is not possible to create a foreign key on two columns those references on 2 columns in another table? Those 2 columns have each a unique constraint.
I have:
CREATE TABLE T_PK (ID1 INT CONSTRAINT CHK_UNIQUE1 UNIQUE,ID2 INT CONSTRAINT CHK_UNIQUE2 UNIQUE)
CREATE TABLE T_FK (ID1 INT, ID2 INT)
And I want to do:
ALTER TABLE T_FK ADD CONSTRAINT CHK_FK FOREIGN KEY (ID1, ID2) REFERENCES T_PK (ID1,ID2)
I see no reason why this is not working because always
a row in the table T_FK referencing only one row in table T_PK.
Thank you.
Have a nice day.
why it is not possible to create a Foreign key to a Unique constraint?
Table A has column 1 holding a Primay key and two columns (2 and 3) holding a Unique combination (and some more columns).He created an Unique constraint on column 2 and 3 together.
He wanted to use this Unique combination to point to table B (instead of the table 1's PK) so he tried to create a foreign key on a column in table B but an error popped up prompting;
The columns in table 'TABLE_A' do not match an existing primary key or UNIQUE constraint.
Ok - these two columns ar no PK but the hold an Unique constraint......
Introduction
This MS SQL Store Procedure solves a problem which is not common
except when you have a table in a database which each row needs
to be uniquely identified and their are more rows in the table
than you can identfy with a big int or Unique Identifier.
So for example,
if you used a "unique identifier" you would be limited to
8.6904152163272468261061026005374e+50 unique rows at best.
If you used a "Big Int" you would be limited to -2^63 (
-9223372036854775808) through 2^63-1 (9223372036854775807).
This method will allow you to have 2.2528399544939174411840147874773e+106. (With cluster indexing the
identity field.)
or, 4.722366482869645213696e+129 (Without indexing the identity field)
Why would you need that many unique values? Well, the reason for
this invention is due to the need to track every email that an
application sends for Sarbanes/Oxley Requirements. With this
technique, every email sent out will be uniquely identified for a
very very very long time.
The purpose of this is to show how to set up an identity column with
a larger range than a big int or unique id. Try transaction logs
where you need to track every change, or determining click paths
through a website, etc.
The point is, that this method pretty much does what the title
says, "Create unlimited Unique ID's". What table you apply this too
and for what reason is up the the programmer.
Background
This design uses basic counting methods and handles the limitations
of MS SQL TSQL. First, you can use a varchar(4000) as the unique id
column but the issue with this is that as of MSSQL 2000, the largest
indexable field is 900 character. So if you need to be able to
quickly search the table by key, or clustered keys, you need to limit
your key column with to 900 characters, otherwise if you use a varchar(4000) make sure when searching the table you create a
temporary table, select the subset into it and search that.
Using the code
First, copy and paste all the TSQL into a Query Window and
compile it in the database you wish to use it in.
[Code]
/**********************************************************************************
Program: ALTER Unlimited Unique ID's (Auto Increment)
Programmer: Vince Gee
Date: 9/28/2005
Parameters:
@TABLE_NAME - The name of the table to establish the auto incrementing field in
@COLUMN_NAME - The column name in the table to establish the auto incrementing field in
@DROP_EXISTING_TRIGGER - Whether or not on running to drop an existing trigger with
the same name.
Theory:
A varchar 900 field will be able to have 2.2528399544939174411840147874773e+106 unique identifiers in it.
A uniqueID only has 8.6904152163272468261061026005374e+50 unique identifiers in it.
Description:
The purpose of the sql procedure is to automate the creation of
auto updating identities on a sql table without the trouble of
writing the trigger each time.
So what does this do? Well for example lets say we have the following
table which you will have many many many rows in.
ALTER TABLE [Countertest]
(
[myKey] [varchar] (900) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[anyvalue1] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[anyvalue2] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[AA] [text] COLLATE SQL_Latin1_General_CP1_CI_AS NULL
)
myKey is the unique identifier for each row. We can set it's size really
to anything, This proc will look for the column specified and determine it's
size. The column should be nvarchar of type
All the other columns don't matter, the only issue is if all the column names concated
together exceed the storage compacity w/ the trigger code of 4000 characters. If this
is the case your gonna have to write the trigger manually.
So to set the auto incrementing field up you would call this proc:
Execute SP_SET_UNIQUE_FIELD 'Countertest','myKey'
or
Execute SP_SET_UNIQUE_FIELD 'Countertest','myKey',1
Output:
When data is inserted into the table, the auto incrementing field will look like
0000000001
0000000002
0000000003
0000000004
0000000005
0000000006
0000000007
0000000008
0000000009
000000000A
000000000B
000000000C
000000000D
000000000E
000000000F
000000000G
000000000H
000000000I
000000000J
000000000K
000000000L
with how many 0's set up etc. It goes 0-9, then A-Z
***********************************************************************************/
ALTER PROC SP_SET_UNIQUE_FIELD
@TABLE_NAME VARCHAR(255),
@COLUMN_NAME VARCHAR(255),
@DROP_EXISTING_TRIGGER BIT =0
AS
DECLARE
@EXECSQLSTRING nvarchar (4000),
@counter int,
@COLUMN_NAMES varchar(4000),
@tCOLUMN_NAME varchar(4000),
@MAXORDINAL int,
@KEYLENGTH int
--If the trigger
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[' + 'IO_Trig_INS_' + @COLUMN_NAME + ']') and OBJECTPROPERTY(id, N'IsTrigger') = 1)
begin
IF @DROP_EXISTING_TRIGGER = 0
BEGIN
-- USER DOESN'T WANT US TO AUTODROP THE TRIGGER, BY DEFAULT AUTODROP TRIGGER IS OFF
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'
PRINT 'STOP ERROR :: PLEASE DROP THE EXISTING TRIGGER BEFORE RUNNING THIS PROC'
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'
RETURN
END
ELSE
BEGIN
--CREATE A SQL STRING TO DROP THE TRIGGER SO WE CAN RECREATE IT.
set @EXECSQLSTRING = 'drop trigger IO_Trig_INS_' + @COLUMN_NAME
--EXECUTE THE SQL
EXEC SP_EXECUTESQL @EXECSQLSTRING
END
end
--CREATE A TABLE TO HOLD THE RESULTS FOR THE SP_COLUMNS
create table #temp
(
TABLE_QUALIFIER varchar(255),
TABLE_OWNER varchar(255),
TABLE_NAME varchar(255),
COLUMN_NAME varchar(255),
DATA_TYPE int,
[TYPE_NAME] varchar(255),
[PRECISION] int,
LENGTH int,
SCALE int,
RADIX int,
NULLABLE int,
REMARKS varchar(255),
COLUMN_DEF varchar(255),
SQL_DATA_TYPE int,
SQL_DATETIME_SUB varchar(255),
CHAR_OCTET_LENGTH int,
ORDINAL_POSITION int,
IS_NULLABLE varchar(255),
SS_DATA_TYPE int
)
--POPULATE THE TEMP TABLE W/ A SP_COLUMNS ON THE TARGET TABLE
insert into #temp
exec sp_columns @TABLE_NAME
--CYCLE THROUGH ALL THE COLUMN NAMES AND BUILD OUR COLUMN NAME STRING
--FOR INSERTS. THE LAST COLUMN NAME IS ALWAYS THE IDENTITY FIELD.
SELECT @MAXORDINAL = MAX(ORDINAL_POSITION) FROM #TEMP
SET @COUNTER = 1
SET @COLUMN_NAMES = ''
WHILE @COUNTER <= @MAXORDINAL
BEGIN
select @tCOLUMN_NAME = COLUMN_NAME FROM #TEMP WHERE ORDINAL_POSITION = @COUNTER
if (@tCOLUMN_NAME <> @COLUMN_NAME)
begin
SET @COLUMN_NAMES = @COLUMN_NAMES + @tCOLUMN_NAME+ ','
end
else
begin
select @KEYLENGTH = LENGTH FROM #TEMP WHERE ORDINAL_POSITION = @COUNTER
end
SET @COUNTER = @COUNTER +1
END
--CLEAN UP
drop table #temp
IF @KEYLENGTH > 900
Begin
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!WARNING:: YOU WILL NOT BE ABLE TO INDEX THIS TABLE BY YOUR CHOSEN COLUMN,!!!!!!!!!!!!!!!!!!!!!'
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!BECAUSE THE COLUMN IS OVER 900 CHARACTERS. 900 CHARS ARE THE MAX THAT !!!!!!!!!!!!!!!!!!!!!'
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!THAT CAN BE INDEXED !!!!!!!!!!!!!!!!!!!!!'
PRINT '!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!'
END
SET @EXECSQLSTRING = '
CREATE TRIGGER IO_Trig_INS_' + @COLUMN_NAME + ' ON ' + @TABLE_NAME + '
INSTEAD OF INSERT
AS
BEGIN
DECLARE
@VALUE VARCHAR(' + CONVERT(VARCHAR(900),@KEYLENGTH) + '),
@REVERSED_VALUE VARCHAR(' + CONVERT(VARCHAR(900),@KEYLENGTH) + '),
@COUNTER INT,
@LEFT_SIDE VARCHAR(' + CONVERT(VARCHAR(900),@KEYLENGTH) + '),
@RIGHT_SIDE VARCHAR(' + CONVERT(VARCHAR(900),@KEYLENGTH) + '),
@CHAR_VALUE CHAR
select @VALUE = ISNULL(MAX(' + @COLUMN_NAME + '),REPLICATE (' + "'0'" + ',' + CONVERT(VARCHAR(900),@KEYLENGTH) + ') ) from ' + @TABLE_NAME + '
SET @REVERSED_VALUE = REVERSE(@VALUE)
SET @COUNTER = 1
WHILE @COUNTER <= LEN(@REVERSED_VALUE)
BEGIN
SET @CHAR_VALUE = SUBSTRING(@REVERSED_VALUE,@COUNTER,1)
IF ASCII(@CHAR_VALUE) <> 122
BEGIN
IF @COUNTER = 1
SET @LEFT_SIDE = ''''
ELSE
SET @LEFT_SIDE = LEFT (@REVERSED_VALUE,@COUNTER - 1)
IF @COUNTER = LEN(@VALUE)
SET @RIGHT_SIDE = ''''
ELSE
SET @RIGHT_SIDE = RIGHT (@REVERSED_VALUE,LEN(@REVERSED_VALUE)- @COUNTER)
IF ASCII(@CHAR_VALUE) + 1 = 58
SET @CHAR_VALUE = CHAR(97)
ELSE
SET @CHAR_VALUE = CHAR(ASCII(@CHAR_VALUE) + 1)
SET @REVERSED_VALUE = ISNULL(@LEFT_SIDE,"") + ISNULL(@CHAR_VALUE,"") + ISNULL(@RIGHT_SIDE,"")
BREAK
END
ELSE
BEGIN
IF @COUNTER = 1
SET @LEFT_SIDE = ''''
ELSE
SET @LEFT_SIDE = LEFT (@REVERSED_VALUE,@COUNTER - 1)
IF @COUNTER = LEN(@VALUE)
SET @RIGHT_SIDE = ''''
ELSE
SET @RIGHT_SIDE = RIGHT (@REVERSED_VALUE,LEN(@REVERSED_VALUE)- @COUNTER)
SET @CHAR_VALUE = CHAR(48) --SET THE CURRENT POSITION TO ZERO AND WE INCREMENT THE NEXT DIGIT.
SET @REVERSED_VALUE = ISNULL(@LEFT_SIDE,"") + ISNULL(@CHAR_VALUE,"") + ISNULL(@RIGHT_SIDE,"")
END
SET @COUNTER = @COUNTER +1
END
SET @VALUE = REVERSE (@REVERSED_VALUE)
INSERT INTO ' + @TABLE_NAME + ' (' + @COLUMN_NAMES + @COLUMN_NAME + ')
SELECT
' + @COLUMN_NAMES + '@VALUE
FROM
inserted
END'
if len(@EXECSQLSTRING) <4000
begin
EXEC SP_EXECUTESQL @EXECSQLSTRING
end
else
begin
print 'STOP ERROR:: BUFFER OVERFLOW. THE GENERATED TRIGGER TEXT > 4000, Trigger must be hand written.'
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
First, to test the functionality create a temp table.
First, to test the functionality create a temp table.
Create TABLE [Countertest]
(
[myKey] [varchar] (900) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[anyvalue1] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[anyvalue2] [varchar] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[AA] [text] COLLATE SQL_Latin1_General_CP1_CI_AS NULL
)
Second, call the proc on the table. Parameters are:
Table Name - Name of the table to put the trigger on.
Column Name - Name of the column to use as the key.
Drop Existing Trigger - If this is set to 1 and a trigger with the name generated by this stored procedure exists it will drop it. (OPTIONAL)
Execute SP_SET_UNIQUE_FIELD 'Countertest','myKey'
or
Execute SP_SET_UNIQUE_FIELD 'Countertest','myKey',1
Now, we are going to test how this works. Copy and paste the following code into a query analyzer.
declare @t int
set @t = 0
while @t <= 40000
begin
insert into countertest
select '','s','s','s'
set @t = @t + 1
end
GO
Once this completes, you can inspect the unique id by selecting it from the table
SELECT RIGHT (MYKEY,10) FROM countertest
The table will keep incrementing the key column first 0-9 then a-z. When it reaches all 'z' it will roll over, but if your key column is wide enough this shouldn't happen while your still employeed.
Also, the stored procedure figures out how wide the key column is automatically and adjusts the script accordingly. So if you widen or shrink the key column, just rerun the proc to update the trigger script.
Hi, can anyone guide me on how to create a unique field with SqlExpress and VC#.net?
I know how to create primary key with identity, however I need to create another unique column for "email". I have search high and low for a solution but found none, the closest i got is unique constraint which I've not idea what's that.
Please help, else I have to always do a duplication check before inserting new records.
Many thanks.
I'm new to MS SQL and VB. I have a table with one field JOB_NAME containing 20 records. Out of that field I want to retrieve 6 of the 20 records into a pulldown menu. They are all unique text names like so:
Anna Smith
John Doe
etc. I did not see IDs listed for any of the names in the table when I looked.
There is no common denominator to the names that can be filtered in the SELECT statement, and the 6 that I want will need to be pulled out individually.
Is there a way to do this with a SELECT statement? I have not found much information about how to extract unique records out of a single field. Here's the statement I'm using which pulls all of them:
strSQL = "SELECT DISTINCT JOB_NAME AS Names FROM [WORKER_NAMES] WHERE JOB_NAME<>' ' ORDER BY JOB_NAME ASC"
This gives me the total list but I only want to bring back 6 of the 20 for the pulldown.
Is there a way to modify this statement to pull only the records that I want?
Thanks for any help you can give.
AJ
So for years I was using the int identity(1,1) primary_key for all the tables I created, and then in this project I decided, you know, I like the uniqueidentifier using newsequentialid() to ensure a distinctly unique primary key.
then, after working with the php sqlsrv driver, I realized huh, no matter what, i am unable to retrieve the scope_identity() of the insert
So of course I cruised back to the MSSMS and realized crap, I can't even make the uniqueidentifier an identity.
So now I'm wondering 2 things...
1: Can I short cut and pull the uniqueidentifier of a newly inserted record, even though the scope_identity() will return null or
2: do I now have to add a column to each table, keep the uniqueidentifier (as all my tables are unified by that relationship) and also add a pk field as an int identity(1,1) primary_key, in order to be able to pull the scope_identity() on insert...
I have a list of movies that show throughout the year. I would like to assign a unique numeric identifier to each text field.
I have provided some sample data with the output I would like. The Movie_ID in the sample data is just made up, feel free to assign any numeric identifier, preferably of the same length but not a necessity.
create table dbo.Movie_Pre_Fix
(
Report_Monthint,
IDint,
Movie_NameVarchar(50)
);
insert into dbo.Movie_Pre_Fix (Report_Month, ID,Movie_Name)
VALUES
(201406,0721312144,'SAW'),
[code]....
I ran into an interesting situation. I'm working on contract and was looking at creating an ERD for an existing database when I ran into a problem. I found FK's that are referencing columns that do not have a unique constraint or a unique index.
I don't know the history of the database but was there a time in SQL Server history where this would have been possible? I scripted out the tables and created it in a test database. When I run the script to create the FK I get the following message.
I double checked the original tables and this FK does exist in table1 and there is no unique anything in the referenced table, table2. Currently the database is running on SQL Server 2008 Ent.
ALTER TABLE [dbo].[table1] WITH CHECK ADD CONSTRAINT [FK_table1] FOREIGN KEY([Col1])
REFERENCES [dbo].[table2] ([col2])
There are no primary or candidate keys in the referenced table 'dbo.table2' that match the referencing column list in the foreign key 'FK_table1'.
Hello, I will explain myself further. I want to make my table in such a way that no two colums have the same value for example:
Row 1 - Column 1 = "cool"
Row 1 - Column 3 = 91
Row 3 - Column 1 = "cool"
Row 3 - Column 3 = 91
I dont care about one column having duplicate values, I want to protect against Column 1 and 3 having the same values on other rows. Is this possible to do in sql server?