LIKE in sp_executesql

If somebody wants to use LIKE in sp_executesql if you use syntax as follows it will give an error.

Wrong Syntax:

LIKE N''%'' @variableName ''%''

Error message received;
Msg 102, Level 15, State 1, Line 24
Incorrect syntax near '%'.

Correct Syntax:

LIKE N''%'' + @variableName + ''%''

Have to double the quotes as well as '+' marks around the variable.

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