Question

I want to collectively some fields to the same value if they meet the criteria in my where clause. So instead of the following:

    UPDATE Table1
SET Column1 = Value1, Column2 = Value2
WHERE Some_Column = Some_Value

I need to do something like:

    UPDATE Table1
SET Column1, Column2 WHERE Some_Column = Some_Value

Answer 1

I am assuming you are trying to chain assignments as is possible in languages like C# where you can do x = y = z = 4; to set multiple variables to the same value.

The UPDATE grammar in MySQL is below

UPDATE [LOW_PRIORITY] [IGNORE] table_reference
    SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
    [WHERE where_condition]
    [ORDER BY ...]
    [LIMIT row_count]

It does not support this. You need to repeat the expression

UPDATE Table1
SET Column1 = expr, Column2 = expr
WHERE Some_Column = Some_Value