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Editorial Team
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Asked: 2026-05-27T01:03:37+00:00

For some reason, the following gives me an error: DECLARE @Param1 DATETIME2(3)=…; — Assign

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For some reason, the following gives me an error:

DECLARE @Param1 DATETIME2(3)=...; -- Assign some date/time
DECLARE @Param2 DATETIME;
DECLARE @Param3 DATETIME;

EXEC dbo.SomeStoredProc CONVERT(DATE, @Param1), @Param2 output, @Param3 output;

The output is a compilation failure:

Msg 156, Level 15, State 1, Line 5 Incorrect syntax near the keyword
‘CONVERT’.

Changing it to the following fixes the problem:

DECLARE @Param1 DATETIME2(3)=...; -- Assign some date/time
DECLARE @Param2 DATETIME;
DECLARE @Param3 DATETIME;
DECLARE @TempDate DATE=CONVERT(DATE,@Param1);

EXEC dbo.SomeStoredProc @TempDate, @Param2 output, @Param3 output;
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1 Answer

  1. Editorial Team

    Stored procedure parameters can’t contain expressions, they have to be constant values or @ variables. In your example, CONVERT() is an expression and is therefore not allowed.

    The same is true for default parameter values.

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