getting error for if/else in a stored procedure

I am relatively very new to SQL queries but I have this stored procedure where I am trying to get value of a declared variable as mentioned below but getting error,

First line is 20 here,

declare @m_ID_v int set @m_ID_v = ( select ID_C from M_T where MName_C = @MName_parameter) declare @g bit if (select G_L_Column from G_L_table Where M_ID_Column = @M_ID_variable) set @g_v = 1 else set @g_variable = 0

Exception I get:

Msg 4145, Level 15, State 1, Procedure GetID, Line 20 An expression of non-boolean type specified in a context where a condition is expected, near 'set'. Msg 156, Level 15, State 1, Procedure GetID, Line 21 Incorrect syntax near the keyword 'else'.

Now if I remove declare @g... and try to parse it, no error occurs


I want my code to check for returned value by my select statement so "if exists" is not really what am looking for, sorry.


declare @m_ID_v int set @m_ID_v = ( select ID_C from M_T where MName_C = @MName_parameter) declare @g bit if ((select G_L_Column from G_L_table Where M_ID_Column = @M_ID_variable) = value ) set @g_v = 1 else set @g_variable = 0


try use if exists:

declare @g_v bit if exists(select G_L_Column from G_L_table Where M_ID_Column = @M_ID_variable) set @g_v = 1 else set @g_v = 0


You can't say

if (select ...

You have to compare something with something else in a if statement, or use a boolean function such as exists


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