Incorrect syntax near 'CAST' in sql server -

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i have table pin_mst below

enter image description here

but following query showing error

msg 102, level 15, state 1, line 1 incorrect syntax near 'cast'.

.. plz help.

select top cast(1 varchar(3)) pin_id pin_mst

try 1 -

select top 1 pin_id  pin_mst

or -

select top 1      cast(1 varchar(3)),      pin_id  pin_mst

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