Challenge To All DBAs
Aug 26, 2005
I have a challenge for all DBAs. I am getting INCONSISTENT TIMINGS for Querry Results from a SQL Server 2000 Standard Edition on a HP Proliant 2 CPU Server with 4 GB RAM and SCSI DrivAFAe.
Our Database is 72 million records and have 8 columns. Most of them are indexed, which are used in the “Where…� clause. In addition to independent indexes, we also have a covering index for 3 most frequently searched fields.
My challenge is that out of the 7000 odd queries that hit the server with various search conditions in a Week, 5% of the queries return result in less than a minute.
The same query at a different Time or with a different Value, returns results inconsistently. For e.g. searching FirstName = “Anna�; LastName = “Williams� returns result in 0.01 sec. Searching for FirstName “Benjamin�; LastName = “Watson� returns in 5 minutes.
Any kind of help is welcome and will be highly appreciated.
- Santy
san.rely@gmail.comNote: Edited to fix white on white font.
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Apr 21, 2002
Where are all of the Production DBAs?
Is there such a thing as a Production DBA in the SQL Server world or is this an outdated concept? Is there a market for people who specialize in database administration as distinct from software development or general network admin? I believe there are such people in the Oracle world, is the SQL Server world different in this regard? Can anyone give me suggestions about how to go about filling such a position?
I am a New York City area employer seeking to fill a position that I think would be ideal for a DBA with 3-5 years of experience in a production environment. The salary would be somewhere between $50K and $60K.
The position involves administering a SQL Server cluster and SAN running our core business application, plus several ancillary SQL Server installations. The application that we are implementing is a third-party product, so no real development is being done at our site. It is, however, fairly complex and requires customization and we do have significant reporting and EDI requirements, so strong T-SQL skills are required.
We are a medium-sized operation, with 900 employees and an eight person IT Dept; the organization’s main focus is insurance not IT, so candidates with a lot of experience might not find it challenging enough, but I think it would be an excellent opportunity for a candidate who might be stuck in the back of a large IT Dept. who wants to move up to a more visible position in a smaller organization.
I would think that there would be a lot of people in this category and, indeed, we have received a lot of resumes, but few of them are from the type of candidate that I had in mind. Most of the resumes are from people whose main focus is development or, if they have had experience in a production environment, have had 10+ years and are seeking salaries way beyond what we can pay. As for the former, I would not automatically reject someone whose prior experience was as a developer—and these skills would certainly be useful to us--I would just be worried that they wouldn’t be happy if they weren’t spending all of their time developing.
http://jobsearch.monster.com/getjob.asp?JobID=14475846&AVSDM=2002%2D04%2D04+16%3A29%3A00%2E000&CCD=my%2Emonster%2Ecom&JSD=jobsearch%2Emonster%2Ecom&HD=company%2Emonster%2Ecom&Logo=1
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Jul 23, 2005
for sql servers how can i determine who [what accounts] are the dbas?
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Jan 25, 2003
worm attack on SQL Servers 1434 port.
Read the links below.
http://www.cert.org/advisories/CA-2003-04.html
:rolleyes:
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Nov 18, 2015
We have an audit happening on our DB environments. All are SQL2008R2. One of the risk highlighed is DBAs are also part of 'Administrators' group on the server. The DBAs having sysadmin (ie full control)on SQL server is not a risk but DBAs included in 'Administators' group is termed as risk.
My question is do the DBAs really need to be Administrator on the box apart from Sysadmins??. If yes,What are the scenarios in which DBA group also need to be an administrator on the box to manage daily admin activities.Â
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Mar 28, 2008
Do DBAs need OS Administrator rights to Manage SQL Server? I suspect the answer is no, but, the DBAs tell me that they cannot do their jobs without OS admin rights.
Can someone point me to documentation detailing what OS level rights are needed by SQL Server DBAs?
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Feb 14, 2006
Hello,
I have been working as Sybase DBA for 5+ years, and I would very much like to add MS SQL Server to my resume. Given the common roots of the two RDBMS, it seems that the learning curve would not be as sharp as if I were going to learn Oracle or DB2. Can anyone out there know of any books that are geared toward learning MS SQL Server from a Sybase DBAs perspective?
Thank you,
- Chris Merz
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Oct 29, 2007
Hi all,
I am a Windows Sysadmin (Active Directory, infrastructure, etc) with light knowledge of SQL 2005. I can set up the database cluster on a shared storage device, I know how to get the heartbeat, do simple backups, etc.
My question pertains to disaster recovery. Right now, we use a product called DoubleTake to copy our database over and 'assume' the identity of the failed SQL server. There are two problems with this -- cost of the license of DoubleTake, and additionally, is it the best method?
I have read before, that you don't need to be a DBA to set up a DR scenario for SQL. My goal really is to have two databases -- one in our production location, and one in a DR location that is pretty much cold (for licensing issues).
If our production database should go down, then it would fail over to the DR site.
What is involved in doing this, what type of steps are required, do you NEED a DBA to manage this, or can a sysadmin (such as myself) take care of it? Also, is it worth having DoubleTake to do this job, and does it do a better or worse job, are there limitations, etc.
Thank you for any replies you can give, and please keep in mind that I'm far from a DBA .
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Oct 4, 2006
I just don't have the skills to work this out...maybe there is an SQL guru out there that can solve this:I can't work out how to do a recursive query so I'm using this function:Public Shared Function FindFriendsFriends(ByVal userID As Integer)Dim iUserID As Integer = userIDDim friendAdapter As New TableAdapters.FriendsTableAdapterDim oFriends As New FrontEnd.FriendsFriendsDataTableDim oTemp As New Data.DataTableDim oContainer As New Data.DataTableoFriends = friendAdapter.GetFriendsByUserID(iUserID)For InLoopCounter As Integer = 0 To oFriends.Count - 1oTemp = friendAdapter.GetFriendsByUserID(oFriends.Rows(0)("UserID"))oContainer.Merge(oTemp)NextReturn oContainerEnd FunctionWith this SQL statement in the table adapter is:SELECT tblFriends.FriendHashID, tblFriends.cCreated, tblFriends.UserOwnerID, tblUsers.UserID, tblUsers.Displayname, tblUsers.EmailAddress, tblFriends.RequestStatus, tblFriends.FriendUserID, tblUsers.ProfilePhoto FROM tblFriends INNER JOIN tblUsers ON tblFriends.FriendUserID = tblUsers.UserID WHERE (tblFriends.UserOwnerID = @UserID) AND (tblFriends.RequestStatus = 2) UNION SELECT tblFriends_1.FriendHashID, tblFriends_1.cCreated, tblFriends_1.UserOwnerID, tblUsers_1.UserID, tblUsers_1.Displayname, tblUsers_1.EmailAddress, tblFriends_1.RequestStatus, tblFriends_1.FriendUserID, tblUsers_1.ProfilePhoto FROM tblFriends AS tblFriends_1 INNER JOIN tblUsers AS tblUsers_1 ON tblFriends_1.UserOwnerID = tblUsers_1.UserID WHERE (tblFriends_1.RequestStatus = 2) AND (tblFriends_1.FriendUserID = @UserID)I want to replace the SQL statement with a recursive query that I simply pass the UserID to and get rid of the function which is very inefficient!
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Sep 2, 2004
Ok, here's the problem. I have CA's Unicenter ServiceIT Enterprise Edition 5.0 running on a production box that has NT4 (SP6) and SQL server 2000 running on it.
Just before we continue, this is about backing up the database that ServiceIT connects to.
I know that you can schedule EM to make backup's of a specific database over a certain time, but this is part of the problem. What i have since discovered is that ServiceIT will not run on a database backed up and restored by EM.
It will however run on the restored backup created through the dos command pdm_backup (comes with ServiceIT).
What i am trying to figure out is to try a find a way that i can run a dos prompt command to do the following tasks at a specific time of day:
Stop the Paradigm Server Daemons (service)
Run a DBCC CHECKDB on the database AHDTEST50.
If there are no errors, create a verbose backup using the dos command pdm_backup -v -fC:ackup[todaysdate]
If there are errors run a script to correct them, then run a backup
Restart the Paradigm Server Daemons
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Aug 2, 2007
How can i programmatically via Tsql change the datatype of all the columns of a table to varchar(1000)???
Like I have a table employee
Employee
(
colA int
colB int
colC varchar
)
If i run the tsql..
it should give me
Employee
(
colA varchar
colB varchar
colC varchar
)
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Jan 8, 2008
Hello guy!
I wrote a stored procedure that searches for user on my table depending on the search option chosen by the person doing the search. But my challenge is displaying users without a picture. On my members table, i used -1 to indicate a user that doesn't have or set his/her picture, this makes it difficult for me to track that person when the person searching chooses to display members with or without pictures. What happen is that my inner join of the photos table dat reference the user primarypictureid does not exist in the photos table. How do i overcome this challenge. My script
CREATE PROCEDURE [dbo].[spSearchMember]
@username nvarchar(30),
@searchfor char(1),
@firstage int,
@secondage int,
@countryid varchar(50),
@withpicture nvarchar(5)
AS
IF(@withpicture = 'False')
SET @withpicture = '%[0-9]'
IF (@withpicture = 'True')
SET @withpicture = '%[0-9][^-]'
IF(@countryId = '-1')
SET @countryid = '%'
BEGIN
SELECT m.UserName, m.MemberId, m.Gender, m.PrimaryPictureId, DATEDIFF(year,m.BirthDate,GETDATE()) AS 'Age',
c.CountryName, p.PicFileName
FROM Members AS m
INNER JOIN Photos AS p
ON m.PrimaryPictureId = p.PictureId
INNER JOIN Countries AS c
ON m.CountryId = c.CountryId
WHERE (m.Gender = @searchfor) AND (DATEDIFF(year,m.BirthDate,GETDATE()) BETWEEN @firstage AND @secondage)
AND (m.CountryId LIKE @countryid) AND (p.PictureId LIKE @withpicture) AND (m.UserName <> @username)
ORDER BY m.BirthDate ASC
END
Thank!!!!!
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Jun 14, 2001
I have a query that I am trying to optimize. It works on some 9000 records and runs too slow. What the query does is takes the multiple assignment of a single contact record to multiple attributes (a.k.a many-to-many). For example:
Membership table.
Contact_ID
1
2
3
Relate table
1 1
1 3
1 4
Relate Item
1 item1
2 item2
3 item3
4 item4
The query will take all ocurrences of the related items and place them in a single field while delimiting by comma "item1" , "item3", "item4"
Here is the query as it exists now:
select
CONTACT_ID,
UNION_NAME
into #tmp
from MEM_UN MU
inner join MEM_UN_REL MUR
on MU.UNION_ID = MUR.UNION_ID
order by CONTACT_ID, UNION_NAME
create TABLE #unionlist (
CONTACT_ID int primary key,
UNIONS varchar(2000) null)
insert into #unionlist (CONTACT_ID, UNIONS)
select distinct CONTACT_ID, UNIONS = '' from MEMBERSHIP
while exists(select CONTACT_ID from #tmp)
BEGIN
update #unionlist
set UNIONS = UNIONS + '"' + (
select min(UNION_NAME) from #tmp
where #unionlist.CONTACT_ID = #tmp.CONTACT_ID
) + '",'
where CONTACT_ID in (select CONTACT_ID from #tmp)
update #unionlist
set UNIONS = UNIONS + '"",'
where CONTACT_ID not in (select CONTACT_ID FROM #tmp)
delete FROM #tmp where UNION_NAME in (
select min(UNION_NAME) from #tmp tmp2
where #tmp.CONTACT_ID = tmp2.CONTACT_ID
)
END
I believe that the slow down is in the process of deleting from #tmp every time it loops through the recordset.
Any suggestions appreciated,
Thx,
Dave
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Mar 27, 1999
On march 23, Micorosoft was supposed to benchmarch their SQL server 7.0 versus Oracle 8i. I didn't watch the benchmark... I figured that I would be able to read about it in the news. But it seems like there is some moritorium on the subject. I haven't found any result information whatsoever.
Does anybody know who won the challenge? Did microsoft win $1 million from oracle?
Tom Mack, MCSE
Database Administrator
Advancia Corporation
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Jul 12, 2005
We're having to work with some legacy data. The tables in the so-called database seem to have way more nulls than actual data. One table appears to have around 100 or more columns in it. It has close to 40,000 rows.
This Db has pretty much 0 normalization present.
IOW, your worst nightmare.
Is there a way we could run a query that would return the total number cells inthat contain NULL and another that could return the total number of data-bearing cells so we could come up with a % or a ratio.
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Sep 7, 2004
Hello Everybody,
I am attaching a picture of what the table should look like before and after the transformation. Can anybody help? Thank you in advance.
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Nov 9, 2004
Hi guys!
Can anyone tell how I can parse the WHERE clause of an SQL statement to check for special characters such as ''' (single quotes) in fields of type varchar?
thanks
nelo
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Apr 7, 2006
Well i wanted to prove to some guys that cursors are not really that important:shocked: .
:D So this code is suppose to remove duplicate tuples from a table without temporary tables or cursors:D. Except it needs some optimization(and alot of system down time, not sure about that:confused: ).
I would like it, if some one could find an instance of the table when the below code fails or some way to optimize the code or anything;) .
--trashtable for real data
create table abc
(col1 tinyint,
col2 tinyint,
col3 tinyint)
--trash values for trash table
insert into abc values (1,1,1)
insert into abc values (1,1,1)
insert into abc values (1,1,1)
insert into abc values (1,1,1)
insert into abc values (2,2,2)
insert into abc values (2,2,2)
insert into abc values (2,2,2)
insert into abc values (3,2,1)
insert into abc values (2,2,3)
insert into abc values (3,2,4)
--check that there are ten rows
select * from abc
--check that there are only five distinct rows
select distinct * from abc
--run code : next 15 line as a batch
declare @lp tinyint
declare @col1 tinyint,@col2 tinyint,@col3 tinyint
set @lp=1
while @lp>0
begin
if not exists (select top 1 * from abc group by col1,col2,col3 having count(col1)>1)
set @lp=0
else
begin
select top 1 @col1 = col1,@col2 = col2,@col3 = col3 from abc group by col1,col2,col3 having count(col1)>1
delete from abc where col1=@col1 and col2=@col2 and col3=@col3
insert into abc values(@col1,@col2,@col3)
end
end
--only distinct values left in trash table
select * from abc
--think code can be optimized
--just wanted to prove: can be done without cursors or temporary tables
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Jun 16, 2008
I have a database with three tables: Employees, Assets, and Recovery.
I have the following SELECT statement:
SELECT Employees.EmployeeID, SUM(Assets.Amount) AS [Case Value:], SUM(Recovery.Recovery) AS [Recovery:]
FROM Assets INNER JOIN
Employees ON Assets.EmployeeID = Employees.EmployeeID INNER JOIN
Recovery ON Employees.EmployeeID = Recovery.EmployeeID
GROUP BY Employees.EmployeeID
Here is the challenge:
You will always have data in the Employee table, but not neccesarily in the Assets or Recovery table.
If there are no Assets or Recovery I would still like the query to show 0.00 for the Assets or Recovery for each Employees.EmployeesID
With the above SELECT statement it will only return values that have data created in each of the three tables.
How do you modify the SELECT statement so a row is returned for every Employees.EmployeeID?
Any help will be appreciated!
losstww
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Sep 19, 2005
Here is the table:CREATE TABLE [child]([pk_child_id] [int] NOT NULL ,[fk_parent_id] [int] NOT NULL ,[code] [char] (2)NOT NULL ,[dt] [datetime] NOT NULL ,[newcode] [int] NULL)There is a situation where there will be more than one record with thesame [fk_parent_id] value, but different values for the [code]field.If one of those records has a [code]= 5, but the [dt] is AFTER asimilar record where [code]= 6 or [code]= 7 (but same [fk_parent_id]value), I need to set [newcode] = 10. How can I pull this off? Again,the group of records can have different [code] values, different [dt]values, but a common [fk_parent_id].Help!
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Jun 6, 2006
This code is attempting to find records that have a RegJrnID that doesnot occur more than one time in the table.The reason that I want to find records with non-duplicated RegJrnIDvalues is to create "reversal" records for these such that the reversalrecord has identical values for every column except the TaxableAmountwhich will contain a negative amount. (see: example data below)./* Set up */CREATE TABLE t1(RegJrnID INTEGER, InvoiceDate VARCHAR(8), InvoiceNumberVARCHAR(20), TaxableAmount DECIMAL(32,8))/* Example data */INSERT INTO t1 VALUES (1, '20060101', '2321323', 100.00)INSERT INTO t1 VALUES (9, '20060213', '2130009', 40.01)INSERT INTO t1 VALUES (3, '20060101', '9402293', 512.44)INSERT INTO t1 VALUES (1, '20060104', '2321323', -100.00)INSERT INTO t1 VALUES (4, '20060105', '9302221', 612.12)INSERT INTO t1 VALUES (5, '20060105', '0003235', 18.11)INSERT INTO t1 VALUES (6, '20060111', '5953432', 2101.21)INSERT INTO t1 VALUES (3, '20060111', '9402293', -512.44)INSERT INTO t1 VALUES (7, '20060115', '4234444', 44.52)INSERT INTO t1 VALUES (8, '20060115', '0342222', 95.21)INSERT INTO t1 VALUES (6, '20060119', '5953432', -2101.21)INSERT INTO t1 VALUES (2, '20060101', '5440033', 231.01)/* Show what's in the table - just because */SELECT * FROM t1 ORDER BY RegJrnID, InvoiceDate/* Query for records to reverse */SELECT *FROM t1 a/* Ignore records that have already been reversed */WHERE a.RegJrnID != ALL/* This subselect finds reversed records (i.e. those that have aduplicate RegJrnID) */(SELECT b.RegJrnIDFROM t1 bGROUP BY b.RegJrnIDHAVING COUNT(*) > 1)/* User selection criteria are appended here *//* AND InvoiceNumber >= '5000000' AND InvoiceNumber <= '7500000' *//* Make the results look pretty (optional) */ORDER BY RegJrnID/* Housekeeping */DROP TABLE t1
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Aug 9, 2006
Hello Expert,Here I am asking your help.I have a table with following data:TaskID ParentTaskID TaskName ProjectName1 1 BA Rail2 22 FA Financial3 1 BA.1 Rail4 1 BA.2 Rail5 22 FA.1 Financial6 22 FA.2 FinancialNow I want the following format:ID ParentID Name1 1 Rail2 1 BA3 2 BA.14 2 BA.25 22 Financial6 5 FA.17 5 FA.2I need to create following hierarchy if I could tranform the data theabove way in the Project Dimension:Rail--BA----BA.1----BA.2Financial--FA----FA.1----FA.2Please help and thanks in advance,Soumya
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Apr 15, 2008
Hi,
I have created a report with the following input parameters
FromDate (mandatory)
ToDate (mandatory)
Installation (mandatory, Multi Value)
Code (mandatory, Multi Value)
SearchCriteria1 (Allow Null Value)
SearchCriteria2 (Allow Null Value)
The Search criteria input parameters allow the user to search for occurences of keywords in the comments field.
The query looks like this:
SELECT installation, day_, code, from_time, to_time, commentFROM LogWHERE code IN (@Code) AND day_ TO BETWEEN @FromDate AND @ToDate AND installation IN (@Installation) AND UPPER(comment) LIKE ('%'+UPPER(@SearchCriteria1)+'%') OR UPPER(comment) LIKE ('%'+UPPER(@SearchCriteria2)+'%')
The problem is it does not work when both the Search criterias are null. I have searched the web for solutions, but not found it. I came across the use of ISNULL(@parameter, field), but in conjunction with = and not LIKE. Tried to alter the last two lines of my query to
UPPER(comment) LIKE ('%'+UPPER(ISNULL(@SearchCriteria1,comment))+'%') OR UPPER(comment) LIKE ('%'+UPPER(ISNULL(@SearchCriteria2,comment))+'%')
and now it seems to run forever until it fails (approx. 20 minutes). If I specify a keyword in one or both of the search criterias it returns the result set within 30 seconds.
Would appreciate som help here.
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Aug 2, 2007
I am making a report in Visual Studio..Now my question is,is there anyway that i can add a tab control for my rdl??Hope to here from anyone out there with a know how..Thanks guys!!
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Nov 11, 2007
Im calling all the TSQL gurus to help me with this problem.
Tables:
Contracts (ContractID,Lastname, Firstname, ContractValue, Date Created
Amendments (AmmendmentID, ContractID, Lastname, Firstname, ContractValue, EffectivityDate, DateCreated)
Amendments table is related to contracts thru ContractID.
Changes to the contract table is made by creating a record to the ammendments table. when this
amendment becomes effective it should take effect on the contract. When correcting the contractvalue
the user must input the amount to be added or subtracted.
For Example:
Current Contract: C1, PETRELLI, PITER, 150.00, created on Jan. 01, 2007
Ammendment: A1, C1, PETRELLI, PETER, 20.00, effective on Jan. 20, 2007, created on Jan. 10, 2007
Ammendment: A2, C1, PETRELLI, PETER, 15.00, effective on Mar. 01, 2007, Created on Feb. 01, 2007
The currect Contract:
As of Feb.01, 2007: C1, PETRELLI, PETER, 170.00
As of Mar.05, 2007: C1, PETRELLI, PETER, 185.00
The Challenge here is this:
How can you make an SQL VIEW that will show the list of Current Contractsand use this view to create a stored procedure (with a parameter @CurrentDate)?
The SP will show the current Contracts based on the supplied parameter.
Example:
ShowCurrentContracts(Jan. 05, 2007)
Current Contract: C1, PETRELLI, PITER, 150.00
ShowCurrentContracts(Feb. 05, 2007)
Current Contract: C1, PETRELLI, PETER, 170.00
ShowCurrentContracts(Jun. 05, 2007)
Current Contract: C1, PETRELLI, PETER, 185.00
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May 8, 2002
Hi,
tell me please how I can trace the modification on the table such as "insert" record into one and syncronize mirror table at the same time once the insert has happend, BUT - no indexes no trace jobs, no any modification or objects on the master table... ha?
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Oct 27, 2001
Help! We have a third party product that feeds data into an MS SQL 2000 database. We are trying to replicate this data using merge replication. On the server where the data is replicated, we can read this data but we can't write to the database using the third party product because of the addition of the unique identifiers associated with the replication. Is there any way to "trick" the third party product into believing that they are still accessing data from a non-replicated database????
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Nov 17, 2004
I am not sure if select recursion is possible and thought I would throw this challenge to the dba community. The preference would be to create a view that does the work on the backend instead of writing frontend VB code.
Below is script that creates and populates a temp table along with the desired result-set.
create table #myTest
([id] int identity (1,1),
[Parent] int ,
minutes smallint
)
insert into #myTest (parent,minutes) values (null,1)
insert into #myTest (parent,minutes) values (1,2)
insert into #myTest (parent,minutes) values (1,4)
insert into #myTest (parent,minutes) values (3,8)
Desired resultset:
id Parent Totalminutes
----------- ----------- -------
1 NULL 15
2 1 2
3 1 12
4 3 8
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May 5, 2006
Hey it's not often the blindman asks for advice on sql coding (never, I think), so here is an opportunity to solve a problem I've been knocking my head against for two days.
Here is sample code for setting up the problem:create table #blindman
(pkey smallint primary key,
fkey char(1),
updateddatetime)
insert into #blindman (pkey, fkey, updated)
select1, 'A', '1/1/2006'
UNION
select2, 'B', '1/1/2006'
UNION
select3, 'A', '1/2/2006'
UNION
select4, 'B', '1/2/2006'
UNION
select5, 'A', '1/4/2006'
UNION
select6, 'B', '1/2/2006'
UNION
select7, 'A', '1/3/2006'
UNION
select8, 'B', '1/3/2006'
UNION
select9, 'A', '1/5/2006'
UNION
select10, 'B', '1/5/2006'
drop table #blindman
Notice that for fkey 'B', there are two entries with '1/2/2006', and for fkey 'A' the updated values are not in synch with the order of the primary key.
The challenge: determine the next pkey for each pkey value, ordered by [updated], and using pkey as a tie-breaker when two records have the same [updated] value.
Here is the desired output for the sample data:pkey fkey updated nextpkey
------ ---- ---------- --------
1 A 2006-01-01 3
3 A 2006-01-02 7
7 A 2006-01-03 5
5 A 2006-01-04 9
2 B 2006-01-01 4
4 B 2006-01-02 6
6 B 2006-01-02 8
8 B 2006-01-03 10
Records 9 and 10 are missing because they have not succeeding records, though I'd be just has satisfied to include them with NULL as their nextpkey value.
Ideally, I want this as a VIEW.
Who's up for the challenge?
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Jul 26, 2007
This is killing, me and I think that I'm failing to see something simple here:
If I have a table with logins and datetimes. I need to output any logins that have logged in more than 3 times in any 3 hour period of time, and how may times it was done. For example:
Login table:
user1 01:00
user2 01:13
user1 02:32
user2 01:17
user1 01:12
user2 07:00
user1 04:10
I would need:
user1 2 <-- (times user 1 logged in more than 3 times in 3 hours)
Because:
01:00, 02:32, 01:12 are all within 3 hours of each other
02:32, 01:12, 04:10 are all within 3 hours of each other
Obviously I have alot more data than this, but I'm failing to grasp the logic properly. Trying to do this in a Sybase stored proc.
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Apr 29, 2004
I'm having problems with the query below. It works fine until the "NOT IN" part and I'm not sure why. Basically, I'm getting records where their educ_audio field is set to "no". I've messed with the parens to try to force SQL to process the NOT IN part before the other clauses without avail. Can someone shed some light?
TIA
SELECT distinct contacts.fname, contacts.lname, contacts.company, contacts.contact_id, contacts.business_phone, contacts.emailAddress, contacts.dateLastContact FROM journal INNER JOIN contacts ON journal.contact_id = contacts.contact_id INNER JOIN products ON journal.product_code = products.product_code WHERE ( journal.product_code IN ('ABLE') ) OR (( journal.product_code IN ('JOBS') ) AND ( journal.product_status IN ('12','14','15') )) OR (( products.prod_design IN ('audio') ) AND ( products.library_code IN ('hrss') )) AND (journal.journal_id NOT IN (SELECT journal.journal_id FROM journal INNER JOIN contacts ON journal.contact_id = contacts.contact_id INNER JOIN products ON products.product_code = journal.product_code where ( contacts.educ_audio IN ('no') ) )) ORDER BY contacts.lname asc, contacts.fname
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Apr 30, 2004
Ok .. a challenge ...
How do you swap two columns based on some condition without using a cursor ( I mean a set based solution).
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