How Do I Use A Variable To Specify The Column Name In A Select Statement?
How do I use a variable to specify the column name in a select statement?
declare @columnName <type>
set @columnName='ID'
select @columnName from Table1
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Hiding Or Removing Column Output From Select Statement
I'm executing the following... select COL1, min(COL2) from TABLE group by COL1 the table has many duplicate entries, where COL2 is the primary key and unique, but its the duplicate COL1 entries that have to be removed. I was hoping a simple "delete from table where COL1 not in (select COL1, min(COL2) from TABLE group by COL1)" would do the trick, but obviously in returning two columns from the subselect this won't work. Can I hide the COL2 output from the query that will be put in the subselect? this is a one-off thing, so i'm not overly concerned about overhead or elegance. just need to make it so. tia a
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Using The ORDER BY Clause When The Ordered Column Is Not Needed In The SELECT Statement
Greetings, I have a C# application that calls a stored procedure to query the database (MSSQL 2005). I only have one field/column returned from the query but I need that column ordered. How do I use the ORDER BY clause without returning the index column which does the sorting? The first example is NOT what I want. I want something that works like the second example which only returns the 'Name' column. ALTER PROCEDURE [dbo].[MyProcedure] AS BEGIN SELECT DISTINCT A.Name, A.index FROM ... ... ORDER BY A.[Index], A.Name ASC END ALTER PROCEDURE [dbo].[MyProcedure] AS BEGIN SELECT DISTINCT A.Name FROM ... ... ORDER BY A.[Index] END Thanks
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Select Statement That Will Output Related Rows With Different Column Data Per Row?
Is there a way to build a select statement that will output related rows with different column data per row? I want to return something like: rowtype| ID | value A | 123 | alpha B | 123 | beta C | 123 | delta A | 124 | some val B | 124 | some val 2 C | 124 | some val 3 etc... where for each ID, I have 3 rows that are associated with it and with different corresponding values. I'm thinking that I will have to build a temp table/cursor that will get all the ID data and then loop through it to insert each rowtype data into another temp table. i.e. each ID iteration will do something like: insert into #someTempTable (rowtype, ID, value) values ('A', 123, 'alpha') insert into #someTempTable (rowtype, ID, value) values ('B', 123, 'beta') insert into #someTempTable (rowtype, ID, value) values ('C', 123, 'delta') etc.. After my loop, I will just do a select * from #someTempTable Is there a better, more elegant way instead of using two temp tables? I am using MSSQL 2005
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Can A Column Be Derived Using Substring But The Parameters Are A Result Of A Select Statement?
I have a table which has a field called Org. This field can be segmented from one to five segments based on a user defined delimiter and user defined segment length. Another table contains one row of data with the user defined delimiter and the start and length of each segment. e.g. Table 1 Org aaa:aaa:aa aaa:aaa:ab aaa:aab:aa Table 2 delim Seg1Start Seg1Len Seg2Start Seg2Len Seg3Start Seg3Len : 1 3 5 3 9 2 My objective is to use SSIS and derive three columns from the one column in Table 1 based on the positions defined in Table 2. Table 2 is a single row table. I thought perhaps I could use the substring function and nest the select statement in place of the parameters in the derived column data flow. I don't seem to be able to get this to work. Any ideas? Can this be done in SSIS? I'd really appreciate any insight that anyone might have. Regards, Bill
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Add Column With Fixed Number Of Values (text) To The Select Statement
Hello, I have such a problem. Need to add additional column to my query. The column should consist of set of fixed number (same as number of query rows) values (text). At start thought it's simple but now Im lost. Is there any chance to do it. Apreciate any help. I need to tell that I have only access to select on this database so no use of operation on tables.
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Select Statement Within Select Statement Makes My Query Slow....
Hello... im having a problem with my query optimization.... I have a query that looks like this: SELECT * FROM table1 WHERE location_id IN (SELECT location_id from location_table WHERE account_id = 998) it produces my desired data but it takes 3 minutes to run the query... is there any way to make this faster?... thank you so much...
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Multiple Tables Used In Select Statement Makes My Update Statement Not Work?
I am currently having this problem with gridview and detailview. When I drag either onto the page and set my select statement to pick from one table and then update that data through the gridview (lets say), the update works perfectly. My problem is that the table I am pulling data from is mainly foreign keys. So in order to hide the number values of the foreign keys, I select the string value columns from the tables that contain the primary keys. I then use INNER JOIN in my SELECT so that I only get the data that pertains to the user I am looking to list and edit. I run the "test query" and everything I need shows up as I want it. I then go back to the gridview and change the fields which are foreign keys to templates. When I edit the templates I bind the field that contains the string value of the given foreign key to the template. This works great, because now the user will see string representation instead of the ID numbers that coinside with the string value. So I run my webpage and everything show up as I want it to, all the data is correct and I get no errors. I then click edit (as I have checked the "enable editing" box) and the gridview changes to edit mode. I make my changes and then select "update." When the page refreshes, and the gridview returns, the data is not updated and the original data is shown. I am sorry for so much typing, but I want to be as clear as possible with what I am doing. The only thing I can see being the issue is that when I setup my SELECT and FROM to contain fields from multiple tables, the UPDATE then does not work. When I remove all of my JOIN's and go back to foreign keys and one table the update works again. Below is what I have for my SQL statements:------------------------------------------------------------------------------------------------------------------------------------- SELECT:SELECT People.FirstName, People.LastName, People.FullName, People.PropertyID, People.InviteTypeID, People.RSVP, People.Wheelchair, Property.[House/Day Hab], InviteType.InviteTypeName FROM (InviteType INNER JOIN (Property INNER JOIN People ON Property.PropertyID = People.PropertyID) ON InviteType.InviteTypeID = People.InviteTypeID) WHERE (People.PersonID = ?)UPDATE:UPDATE [People] SET [FirstName] = ?, [LastName] = ?, [FullName] = ?, [PropertyID] = ?, [InviteTypeID] = ?, [RSVP] = ?, [Wheelchair] = ? WHERE [PersonID] = ? ---------------------------------------------------------------------------------------------------------------------------------------The only fields I want to update are in [People]. My WHERE is based on a control that I use to select a person from a drop down list. If I run the test query for the update while setting up my data source the query will update the record in the database. It is when I try to make the update from the gridview that the data is not changed. If anything is not clear please let me know and I will clarify as much as I can. This is my first project using ASP and working with databases so I am completely learning as I go. I took some database courses in college but I have never interacted with them with a web based front end. Any help will be greatly appreciated.Thank you in advance for any time, help, and/or advice you can give.Brian
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Using Conditional Statement In Stored Prcodure To Build Select Statement
hiI need to write a stored procedure that takes input parameters,andaccording to these parameters the retrieved fields in a selectstatement are chosen.what i need to know is how to make the fields of the select statementconditional,taking in consideration that it is more than one fieldaddedfor exampleSQLStmt="select"if param1 thenSQLStmt=SQLStmt+ field1end ifif param2 thenSQLStmt=SQLStmt+ field2end if
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TSQL - Use ORDER BY Statement Without Insertin The Field Name Into The SELECT Statement
Hi guys, I have the query below (running okay): Code Block SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02' FROM myTables WHERE Conditions are true ORDER BY Field01 The results are just as I need: Field01 Field02 ------------- ---------------------- 192473 8461760 192474 22810 Because other reasons. I need to modify that query to: Code Block SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02' INTO AuxiliaryTable FROM myTables WHERE Conditions are true ORDER BY Field01 SELECT DISTINCT [Field02] FROM AuxTable The the results are: Field02 ---------------------- 22810 8461760 And what I need is (without showing any other field): Field02 ---------------------- 8461760 22810 Is there any good suggestion? Thanks in advance for any help, Aldo.
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How To Write Select Statement Inside CASE Statement ?
Hello friends, I want to use select statement in a CASE inside procedure. can I do it? of yes then how can i do it ? following part of the procedure clears my requirement. SELECT E.EmployeeID, CASE E.EmployeeType WHEN 1 THEN select * from Tbl1 WHEN 2 THEN select * from Tbl2 WHEN 3 THEN select * from Tbl3 END FROM EMPLOYEE E can any one help me in this? please give me a sample query. Thanks and Regards, Kiran Suthar
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