Question

I have a simple problem with SQL SERVER charindex function.

DECLARE @VAR1 varchar
SET @VAR1 = 'abcdef'
PRINT CHARINDEX('c', @VAR1)

The above statement should print 3 but prints 0. Why?

Answer 1

When n (length) is not specified in a data definition or variable declaration
statement, the default length is 1.

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Do it like this and your problem is solved:

DECLARE @VAR1 varchar(10)
SET @VAR1 = 'abcdef'
PRINT CHARINDEX('c', @VAR1)

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For more info, check THIS.