sql - insert select with if else condition -


i have 2 tables, table1 , table2, , using 

insert table1  (  col1,    col2,    col3 )   select  (  cola,    colb,    colc )  table2

but logic between col3 , colc this:

if colc = 'a' col3 = y else col3 = n

what's sql this, using sql server 2005.

you can use case expression:

insert table1  (  col1,    col2,    col3 )   select     cola,    colb,    case when colc = 'a' 'y' else 'n' end    -- alternatively:    -- case colc when 'a' 'y' else 'n' end  table2

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