Question

If i have this:

CREATE TABLE ftable (
id     INT,
fvalue VARCHAR(14)
);

INSERT INTO ftable VALUES (1,'tableB'),(2,'tableA');

CREATE TABLE tableA (
value VARCHAR(14)
);

SELECT @tmp:=fvalue FROM ftable WHERE id=2;

How do I make it so I can do this:

INSERT INTO @tmp VALUES ('buhambug');

Becuase as far I know that throws a mysql error.Can someone show me a sqlfiddle of the solution? Or maybe I’m thinking about this the wrong way?

Answer 1

You need to use dynamic SQL to use a variable as an object name:

SET @tmp = (SELECT fvalue FROM ftable WHERE id=2);

SET @SQL = CONCAT('INSERT INTO ',@tmp,' VALUES (''buhambug'')');
PREPARE stmt FROM @SQL;
EXECUTE stmt;

SQL FIDDLE