T-SQL (SS2K8) :: Comparison In The Merge Statement About Null Values?
Aug 22, 2012
I use the merge statement in a sproc to insert, update and delete records from a staging table to a production table.
In the long sql, here is a part of it,
When Matched and
((Student.SchoolID <> esis.SchoolID
OR
Student.GradeLevel <> esis.GradeLevel
OR
Student.LegalName <> esis.LegalName
OR
Student.WithdrawDate <> esis.WithdrawDate
Student.SPEDFlag <> esis.SPEDFlag
OR
Student.MailingAddress <> esis.MailingAddress)
Then update
Set Student.Schoolid=esis.schoolid,
.....
My question is how about if the column has null values in it.for example
if schoolID is null in production table is null, but in staging table is not null, will the <> return true.or if either side of <> has a null value, will it return true.
I don't want it to omit some records and causing the students records not get updated.If not return true, how to fix this?
I am trying to use a date comparison in a statement using the year statement as well. Here is what I have:
Case [LastHireDate] When YEAR([LastHireDate]) < Year(@EndYearlyDate) then '12' When Month([LastHireDate]) = '1' then '12' When Month([LastHireDate]) = '2' then '11' When Month([LastHireDate]) = '3' then '10' When Month([LastHireDate]) = '4' then '9'
[Code] ....
When I am looking at it [LastHireDate] is showing that red line underneath. The < symbol has a red line and @EndYearlyDate has a red line. I can not seem to get them to clear and am, wondering what I am missing. When I execute the error comes up that it does not like the < sign in there.
I am working on some data that is JOINing to another table. Not a big thing. In the child table, there are different values for a single ID. I want to be able to select the Max ColorID that is Not Null, for each distinct CarID. The CarID is what I am joining the other table with. I need selecting the distinct row with the Max ColorID that is not Null. All this data is made up, so nothing looks logical in the design.
DECLARE @ColorList TABLE ( CarID float , ColorID int ) INSERT INTO @ColorList SELECT 1.55948815793043E+15, 9 UNION ALL SELECT 1.55948815793043E+15, 27 UNION ALL
Can we insert into multiple table using merge statement?I'm using SQL Server 2008 R2 and below is my MERGE query...
-> I'm checking if the record exist in Contact table or not. If it exist then I will insert into employee table else I will insert into contact table then employee table.
WITH Cont as ( Select ContactID from Contact where ContactID=@ContactID) MERGE Employee as NewEmp Using Cont as con
I need to list all students who have both parents phone number is null. The parent relationship values 1 and 2 indicates the person is either Mom (value 2) or dad (value 1) of the student. Note: I am using student parent as an example to write my query.
I'm using a Merge statement to update/insert values into a table. The Source is not a table, but the parameters from a Powershell script. I am not using the Primary Key to match on, but rather the Computer Name (FullComputerName).
I am looking on how-to return the Primary Key (ComputerPKID) of an updated record as "chained" scripts will require a Primary Key, new or used.As an aside: the code below does return the newly generated Primary Key of an Inserted record.
I would like to have a 'counter' table which will hold the last used number and return a new number. This is my schema:
if object_id('tempdb.dbo.#Counter', 'u') is not null drop table #Counter go create table #Counter ( Id int not null ) go if exists (select * from #Counter) update #Counter set Id = Id + 1 output inserted.Id else insert into #Counter (Id) output inserted.Id select 1
If the table is empty it returns 1 else it returns the next number (Id + 1). But this query is not atomic (i guess...?) so it could evaluate that the #Counter table is empty and then try to insert into the table, but inbetween someone else executes the insert also. Could this query be rewritten with the merge statement so that the whole operation is atomic?
I have a table with data in two columns, item and system. I am trying to accomplish is we want to compare if an item exists in 1, 2 or all systems. If it exists, show item under that system's column, and display NULL in the other columns.
I have aSQL Fiddle that will allow you to visualize the schema.
The closest I've come to solving this is a SQL pivot, however, this is dependent on me knowing the name of the items, which I won't in a real life scenario.
select [system 1], [system 2], [system 3] from ( SELECT distinct system, item FROM test where item = 'item 1' ) x pivot ( max(item)
Hi. I have an sql table which contains a number and a name. I would like to create a select statement that will display these two fields in the format : "number | name", but if there is a null value in the number it will display only the name and vice versa. How can I do it ? Any help is appreciated.
SELECT NAME, CASE WHEN PHONE IS NULL THEN '-' ELSE PHONE END AS PHONE FROM PATIENT WHERE PHONE = '-'
If I am switching the NULL values to hyphens (-), why am I not getting any records when I look for hyphens in the WHERE clause? The script is not as simple as this or else I would just check for NULL values. I really need to switch NULL values to something I can pass on to a variable and query on it from Reporting Services.
Hello,Thanks for helping me with this... I really appreciate it.I have a table called tblPatientDemographics with a number of columns.I would like to count the number of NULL values per record within mytable.tblPatientDemographicsPatientID Age Weight Height Race1234567 20 155 <NULL> Caucasian8912345 21 <NULL> <NULL> <NULL>In the first example above I want to display '1'In the second example above I want to display '3'Any help would be very much appreciated.Thanks !Chad*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
I have a stored procedure with a SELECT statement, that retrieves 1 row. SELECT name FROM tblNames WHERE nameID = "1" I want all the NULL values in that row to be change in some default values. How do I do this?
If I try to run the code below, and even one of the values in the INNER JOIN statements is NULL, the DataReader ends up with zero rows. What I need is to see the results even if one or more of INNER JOIN statements has a NULL value. For example, if I want info on asset# 2104, and there's no value in the DriverID field, I need the rest of the data to display and just have the lblDriverName by blank. Is that possible?
<code> Sub BindSearchGrid() Dim searchUnitID As String Dim searchQuery As String searchUnitID = tbSearchUnitID.Text lblIDNum.Text = searchUnitID searchQuery = "SELECT * FROM Assets " & _ "INNER JOIN Condition ON Condition.ConditionID = Assets.ConditionID " & _ "INNER JOIN Drivers ON Drivers.DriverID = Assets.DriverID " & _ "INNER JOIN Departments ON Departments.DepartmentID = Assets.DepartmentID " & _ "INNER JOIN AssetCategories ON AssetCategories.AssetCategoryID = Assets.AssetCategoryID " & _ "INNER JOIN Store ON Store.[Store ID] = Assets.StoreID WHERE RTRIM(Assets.[Unit ID]) = '" & searchUnitID & "'"
Dim myReader As SqlDataReader myReader = Data.queryDB(searchQuery) While myReader.Read If Not IsDBNull(myReader("Store Name")) Then lblStrID.Text = myReader("Store Name") If Not IsDBNull(myReader("AssetCategory")) Then lblAsstCat.Text = myReader("AssetCategory") If Not IsDBNull(myReader("Condition Description")) Then lblCondID.Text = myReader("Condition Description") If Not IsDBNull(myReader("DepartmentName")) Then lblDepID.Text = myReader("DepartmentName") If Not IsDBNull(myReader("Unit ID")) Then lblUnID.Text = myReader("Unit ID") If Not IsDBNull(myReader("Year")) Then lblYr.Text = myReader("Year") If Not IsDBNull(myReader("Make")) Then lblMk.Text = myReader("Make") If Not IsDBNull(myReader("Model")) Then lblMod.Text = myReader("Model") If Not IsDBNull(myReader("Mileage")) Then lblMile.Text = myReader("Mileage") If Not IsDBNull(myReader("Vin Number")) Then lblVinNum.Text = myReader("Vin Number") If Not IsDBNull(myReader("License Number")) Then lblLicNum.Text = myReader("License Number") If Not IsDBNull(myReader("Name")) Then lblDriverName.Text = myReader("Name") If Not IsDBNull(myReader("DateAcquired")) Then lblDateAcq.Text = myReader("DateAcquired") If Not IsDBNull(myReader("DateSold")) Then lblDtSld.Text = myReader("DateSold") If Not IsDBNull(myReader("PurchasePrice")) Then lblPrPrice.Text = myReader("PurchasePrice") If Not IsDBNull(myReader("NextSchedMaint")) Then lblNSM.Text = myReader("NextSchedMaint") If Not IsDBNull(myReader("GVWR")) Then lblGrVWR.Text = myReader("GVWR") If Not IsDBNull(myReader("GVW")) Then lblGrVW.Text = myReader("GVW") If Not IsDBNull(myReader("Crane Capacity")) Then lblCrCap.Text = myReader("Crane Capacity") If Not IsDBNull(myReader("Crane Certification")) Then lblCrCert.Text = myReader("Crane Certification") If Not IsDBNull(myReader("Repair Cost")) Then lblRepCost.Text = myReader("Repair Cost") If Not IsDBNull(myReader("Estimate Replacement")) Then lblEstRep.Text = myReader("Estimate Replacement") If Not IsDBNull(myReader("SalvageValue")) Then lblSalVal.Text = myReader("SalvageValue") If Not IsDBNull(myReader("CurrentValue")) Then lblCurVal.Text = myReader("CurrentValue") If Not IsDBNull(myReader("Comments")) Then lblCom.Text = myReader("Comments") If Not IsDBNull(myReader("Description")) Then lblDesc.Text = myReader("Description")
I wrote a select statement, I only want to see orders with max lastUpdatedOn date of 14 days and older. Now my results show dates with all orders of 14 days and older (which is OK), but all others are displayed in the "Uitgifte" column as "NULL". But those orders should not be displayed at all.
selectdistinct ProductionHeader.ProdHeaderOrdNr, ProductionHeader.PartCode, ProductionHeader.Description, ProductionHeader.Qty, (select max (ProdStatusLog.ProdStatusCode)
We are just upgrading a server from 2000 to 2005 and we are getting the message below when we execute a sql statement against a table with a date field with null values:
"Error converting data type DBTYPE_DBTIMESTAMP to datetime."
The Orders table contains orders placed on all the dates. I want to obtain a list of orders for a particular date, if there is no order for a product on the requested date, I want to return null values for the Quantity and Price fields.
I tried the following select statement:
select Products.ProductName, Orders.Quantity, Orders.Price from Products left join Orders on Products.ProductID = Orders.ProductID where Orders.OrderDate = '10/16/2004'
Where, there are a total of three products (A,B,C) in table Products. Product-C has no order on 10/16/2004, but I want it to return :
How do I pass a single column of values from a successful merge join to an EXECUTE SQL statement so it can be used with an "IN" criteria of the WHERE clause? Here's an example of my update statement with two random key values:
UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK IN ("XYZ123", "DEF890")
Is this even possible in SSIS, or am I better off using a loop and running the update EXECUTE SQL Statement for each individual key value, as in the following example?
UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK = "XYZ123" UPDATE dbo.MyTable SET MyStatus = 1 WHERE MyPK = "DEF890"
I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?
I'm trying to compare two fields between two tables using a Merge Join that runs into a conditional. This conditional sorts mismatched rows from validated ones but its returning incorrect mismatches (which means the mismatch is actually a match).
TABLE1 has two DT_STR fields with length 16 and TABLE2 had two DT_STR fields with length 32.
I've used a data conversion component to lengthen the first table's fields to a length of 32 but there still seems to be incorrect mismatches. For example TABLE1 had "AAA" and "BBB" and this appeared as a mismatch. If I used Query Analyzer to check TABLE2 for this criteria it would exist (which means it IS a match).
Is there any way to view hidden characters (i.e. carriage returns, tabs) in those fields? I've tried using RTRIM in my SQL Query for both my data sources and they still don't match up.
I'm looking for comparing times in the same field. I have two tables, one table has times of sessions (multiple rows) and the other contains the session ID, start & end times of overall session block and each session length. I am looking for a way to compare from the start of the session until the end all the times sequentially and insert or mark all the sessions that fall between 10 min intervals.
i.e start 10:30 compare to 10:35 (no match), 10:30 to 10:40 (match 10:40 becomes new effective date), 10:40 to 10:45 (no match), 10:40 to 10:50 (match 10:50 new effective date).
I've attempted a couple of self join solutions but simply can't seem to get what I'm after.
CREATE TABLE MyTable ( [id] INT identity NOT NULL, [sess_id] INT NOT NULL, [Time] datetime NOT NULL ) GO
Hi All,I'm converting some stored procs from Sybase to SQL Server, and I'mhaving serious problems with Null comparisons.When I run the code below on Sybase, it returns both rows. When I runit on MS SQL Server, it returns nothing. I have set ANSI_NULLS off inthe code (and on the session through Query Analyzer), but it doesn'tseem to make any difference. Am I missing something?---------------set ANSI_NULLS offdrop table #TestNullcreate table #TestNull (Field1 varchar(10), Field2 varchar(10))insert into #TestNull values (1, null)insert into #TestNull values (1,1)declare @TestVar varchar(10)select @TestVar = Nullselect * from #TestNull where Field1 = @TestVar---------------Thanks in advance,Saul
I was told that the authentication is a process that concerns about security. So the authentication process should be hidden from the client as possible and the client should receive a flag value (1= password is correct and authenticated, -1= incorrect password) and/or user name of the authenticated user. So it should be a SQL operation that should occur in the back end. So the process in detail should be, client form sends user name and hashed /encrypted password to SQL, SQL authenticates and it sends 1/-1 with the user name to the client as the return value and the output.
But when i do research that was not the case, all the threads i have seen on web, either the app is windows or web, developers do two operations:
1. the salt value of the user is searched by user name then return the salt value along with the PasswordHash to the client form / or to the business layer
2. Then use the entered password and the returned salt value to generate a PasswordHash and then compare this passwordHash with the returned passwordHash. if match password is correct if not password is incorrect.
Is this actually how developers write code to authenticate a user in a login event? If so basically the password comparison happens at the client side(either in the form or in the business layer) then wouldn't this be huge security risk by exposing the actual salt and passwordHash to the client?
I remember at some point I had some problem with this issue and I couldn't find something that suites a newbie. The point that I was missing was that I couldn't pass the string representation of the date value to a query string. The key is to convert the string date to its equivalent datetime or smalldate . For example imagine you'd like to select all Employees who where born on a specific date stored in a variable called myDate: the BirthDay column in our Employee table has type smalldatetime ---------------------------------------------- string myDate = @"06/06/1978"; .... SqlCommand comm = new SqlCommand("SELECT * FROM EMPLOYEE WHERE [BirthDay] = Convert(smalldatetime,'" + myDate + "', 103))"; .... ---------------------------------------------- Make suer that you don't miss single quotes around value of myDate in your query string. For more info regrading the Convert function look at: http://msdn2.microsoft.com/en-us/library/ms187928.aspx
I am trying to think my way through a solution which I believe others have probably come across... I am trying to implement a matching routine wherein I need to match an address against a high value and a low value (or, for that matter an input date vs. a start and end date) to return the desired row ... i.e. if I were to use a straight vb program I would just use the following lookup:
" WHERE zip_code = @zip_code AND addr_prim_lo <= @street_number AND addr_prim_hi >= @street_number " & _
" AND addr_prim_oe = @addr_prim_oe AND street_pre = @street_pre AND street_name = @street_name " & _
" AND street_suff = @street_suff AND street_post = @street_post " & _
" AND (expiry_date = '' OR expiry_date = '00000000' OR expiry_date > @expiry_date)" & _
" GROUP BY fire_ID, police_ID, fire_opt_in_out, police_opt_in_out"
My question, then, is how would you perform this type of query using a lookup / merge join or script? I have not found a way to implement a way to set the input columns? I can set the straight matches without a problem, i.e. lookup zip code = input zip code, but can't think of the correct way to set comparisons, i.e. lookup value 1 <= input value AND lookup value 2 >= input value
How to count the number of values that exist in a row based on the values from an array of numbers. Basically the the array of numbers I want to look for are in row 1 of table [test 1] and I want to search for them and count the "out of" in table [test 2]. Excuse me for not using the easiest way to convey my question below. I guess in short I have 10 numbers and like to find how many of those numbers exist in each row. short example:
Hi all,I have created this simple Stored procedure. But it gives me wrong result when I pass a parameter to it. But if I hard code it, it gives me the right result. The I check if the field value of 'Email' is exactly equal to the parameter '@Email'. The field 'Email' is varchar, and CID is integer. CREATE PROCEDURE EmailExists @Email varcharASSELECT CIDFROM CustomersWHERE Customers.Email = @Emailreturn Instead, if I check the value directly, it gives me correct answer. The the following code works fine when I typethe Email directly in the code. CREATE PROCEDURE EmailExists @Email varcharASSELECT CIDFROM CustomersWHERE Customers.Email = 'tomyseba@yahoo.com' return Can anyone tell me the reason for it. Thanking you in advance
I have a script that I use after some amount of data massaging (not shown). I would like to be able to change the
1) denominator value (the value 8 in line 32 of my code) based on how many columns are selected by the where clause:
where left(CapNumber,charindex('_', CapNumber)-1) = 1where capNumber is a value like [1_1], [1_4], [1_6]...[1_9] capNumber can be any values from [1_1]...[14_10] depending upon the specialty value (example: Allergy) and the final number after the equal sign is a number from 1 to 14)
2) I'd like to dynamically determine the series depending upon which values correspond to the specialty and run for each where: left(CapNumber,charindex('_', CapNumber)-1) = n. n is a number between 1 and 14.
3) finally I'd like to dynamically determine the columns in line 31 (4th line from the bottom)
If I do it by hand it's 23 * 14 separate runs to get separate results for each CapNumber series within specialty. The capNumber series is like [1_1], [1_2], [1_3],[1_4], [1_5], [1_6], [1_7], [1_8],[1_9] ... [8_4],[8_7] ... [14_1], [14_2],...[14_10] etc.
Again, the series are usually discontinuous and specific to each specialty.
Here's the portion of the script (it's at the end) that I'm talking about:
--change values in square brackets below for each specialty as needed and change the denom number in the very last query.
if object_id('tempdb..#tempAllergy') is not null drop table #tempAllergy select * into #tempAllergy from dbo.#temp2 T
[Code] ....
If I were to do it manually I'd uncomment each series line in turn and comment the one I just ran.
I want to aggregate to monthly values for the reading. I want to display Reading value for Oct 2010, November 2010 likewise My question is simple and I have tried to follow the etiquette.
IF OBJECT_ID('TempDB..#mytable','U') IS NOT NULL DROP TABLE #mytable
--===== Create the test table with
CREATE TABLE #mytable ( meterID INT PRIMARY KEY, Readingdate DATETIME, reading real )
--===== Setup any special required conditions especially where dates are concerned
SET DATEFORMAT DMY SELECT '4','Oct 17 2013 12:00AM','5.1709' UNION ALL SELECT '4','Oct 17 2013 12:15AM','5.5319' UNION ALL SELECT '4','Nov 17 2013 12:00AM','5.5793' UNION ALL SELECT '4','Nov 17 2013 14:00AM','5.2471' UNION ALL SELECT '5','Nov 17 2013 12:00AM','5.1177' UNION ALL SELECT '5','Nov 17 2013 14:00AM','5.5510' UNION ALL SELECT '5','Dec 17 2013 15:00AM','5.5128', UNION ALL SELECT '5','Dec 17 2013 16:00AM','5.5758' UNION ALL
Output should display as
MeterId Period Reading
4 Oct 13 10.20 4 Nov 13 10.40 5 Oct 13 10.20 5 Nov 13 10.40 4 Dec 13 11.15
I've have a need with SQL Server 2005 (so I've no MERGE statement), I have to merge 2 tables, the target table has 10 fields, the first 4 are the clustered index and primary key, the source table has the same fields and index.Since I can't use the MERGE statement (I'm in SQL 2005) I have to make a double step operation, and INSERT and an UPDATE, I can't figure how to design the WHERE condition for the insert statement.
I have a DTSX package which reads values from a fixed-length text file using a data reader and writes some of the column values from the file to an Oracle table. We have used this DTSX several times without incident but recently the process started inserting NULL values for some of the columns when there was a valid value in the source file. If we extract some of the rows from the source file into a smaller file (i.e 10 rows which incorrectly returned NULLs) and run them through the same package they write the correct values to the table, but running the complete file again results in the NULL values error. As well, if we rerun the same file multiple times the incidence of NULL values varies slightly and does not always seem to impact the same rows. I tried outputting data to a log file to see if I can determine what happens and no error messages are returned but it seems to be the case that the NULL values occur after pulling in the data via a Data Reader. Has anyone seen anything like this before or does anyone have a suggestion on how to try and get some additional debugging information around this error?
how SQL 2012 would treat a literal string for a comparison similar to below. I want to ensure that the server isn't implicitly converting the value as it runs the SQL, so I'd rather change the data type in one of my tables, as unicode isn't required.
Declare @T Table (S varchar(2)) Declare @S nvarchar(255) Insert into @T Values ('AR'), ('AT'), ('AW') Set @S = 'Auto Repairs' Select * from @T T where case @S when 'Auto Repairs' then 'AR' when 'Auto Target' then 'AT' when 'Auto Wash' then 'AW' end = T.STo summarise
in the above would AR, AT and AW in the case statement be treated as a nvarchar, as that's the field the case is wrapped around, or would it be treated as a varchar, as that's what I'm comparing it to.
