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Editorial Team
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Asked: 2026-05-27T09:39:23+00:00

the query is this : UPDATE ParametersMain2 INNER JOIN ParametersMain ON ParametersMain2.VMV_CODE=ParametersMain.VMV_CODE SET ParametersMain2.PARENT_VARIABLE_NAME=ParametersMain.PARENT_VARIABLE_NAME

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the query is this :

UPDATE ParametersMain2 INNER JOIN ParametersMain
ON ParametersMain2.VMV_CODE=ParametersMain.VMV_CODE
SET ParametersMain2.PARENT_VARIABLE_NAME=ParametersMain.PARENT_VARIABLE_NAME
AND ParametersMain2.VARIABLE_NAME=ParametersMain.VARIABLE_NAME;

Each time it says all the entries are being updated. each time i go look. the PARENT_VARIABLE_NAME fields and VARIABLE_NAME fields are still blank in ParametersMain2.
and the entire column of those fields are filled in in ParametersMain

why isntit working? i checked to see that its all the same data types and formats between the two tables.

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1 Answer

  1. Editorial Team

    Swap the AND with a comma, as below. 

    UPDATE 
    ParametersMain2 

        INNER JOIN 
    ParametersMain 
        ON ParametersMain2.VMV_CODE = ParametersMain.VMV_CODE
SET 
    ParametersMain2.PARENT_VARIABLE_NAME = ParametersMain.PARENT_VARIABLE_NAME , 
    ParametersMain2.VARIABLE_NAME = ParametersMain.VARIABLE_NAME;

    AND is operator that combines booleans (and nulls), if you want to set multiple fields separate them with a comma.

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