Using comparison operators in SELECT clause of T-SQL query

sql sql-server sql-server-2008 tsql comparison-operators
abatishchev picture abatishchev · Feb 24, 2010 · Viewed 37.5k times · Source

How to select a result of comparison operator as a field with type BIT?

How it does work in C#:

bool isGreater = FieldA > FieldB;

How it doesn't work in T-SQL:

SELECT (FieldA > FieldB) AS BIT FROM t

How to write such task properly?

Answer

Rockcoder picture Rockcoder · Feb 25, 2010

You should use CASE clause:

CASE
    WHEN FieldA > FieldB THEN 1
    ELSE 0
END AS [BIT]

Related questions

How can I get column names from a table in SQL Server?

I want to query the name of all columns of a table. I found how to do this in: Oracle MySQL PostgreSQL But I also need to know: how can this be done in Microsoft SQL Server (2008 in my case)?

Read More
How can I select the first day of a month in SQL?

I just need to select the first day of the month of a given datetime variable. I know it's quite easy to do using this kind of code: select CAST(CAST(YEAR(@mydate) AS VARCHAR(4)) + '/' + CAST(MONTH(@mydate) …

Read More
SQL Server SELECT INTO @variable?

I have the following code in one of my Sql (2008) Stored Procs which executes perfectly fine: CREATE PROCEDURE [dbo].[Item_AddItem] @CustomerId uniqueidentifier, @Description nvarchar(100), @Type int, @Username nvarchar(100), AS BEGIN DECLARE @TopRelatedItemId uniqueidentifier; SET @TopRelatedItemId = ( SELECT top(1) RelatedItemId FROM …

Read More