UPDATE query for multiple rows of same column

Question

I have a database table and What I required to do is that,

I need to update the column with the column name 'Co15' of every rows according to the following conditions

Co15 = SAMPLE if Co13 = 'c1' AND Col2 = 'b4'
Co15 = LIST if Co13 = 'c6'

Currently I am running each update query separately as follows

UPDATE tblname SET Co15 = 'SAMPLE' WHERE Co13 = 'c1' AND Col2 = 'b4';                                   

UPDATE tblname SET Co15 = 'LIST' WHERE Co13 = 'c6';

But wanted to know if there is any way where I could run only one update query all at once.

Thanks

Answer 1

Try this

UPDATE tblname SET Co15=  
CASE
  WHEN Co13 = 'c1' AND Col2='b4' THEN 'SAMPLE'
  WHEN Co13 = 'c6' THEN 'LIST'
END

Answer 2

exactly getting the output to as following as:

UPDATE tblname
    SET col5= CASE
        WHEN col3 = 'c1' AND col2 = 'b4' THEN 'SAMPL'
        WHEN col3 = 'c6' THEN 'LIST'
    END

example: sqlfiddle to click here