Question

Trying to insert a value into a specific field. Trying MySQL query such as this at the moment;

INSERT INTO tablename  (*column-name-col2+*)
VALUES 500
WHERE (idcolumn) = X

Anyone suggestions?

Current table layout:

IDCol  |  username1  |  username2 |  username3  | etc

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Answer 1

You need to use UPDATE to add to an already created row in the table, so your code,I think, should be

UPDATE tablename SET columnName='500' WHERE IDCol='X'