Um die Statistiken aller Tabellen zu haben, können Sie eine UNION mit 2 oder mehr Auswahlen verwenden, eine für jede Tabelle:
( SELECT s.*
, table1.title AS name --or whatever field you want to show
FROM stats s
JOIN $tableName1 table1
ON s.id = table1.id
WHERE tableName = '$tableName1'
)
UNION ALL
( SELECT s.*
, table2.name AS name --or whatever field you want to show
FROM stats s
JOIN $tableName2 table2
ON s.id = table2.id
WHERE tableName = '$tableName2'
)
UNION ALL
( SELECT s.*
, table3.lastname AS name --or whatever field you want to show
FROM stats s
JOIN $tableName3 table3
ON s.id = table3.id
WHERE tableName = '$tableName3'
)
;
Verwendung von Winfreds Idee mit LEFT JOIN s. Es liefert unterschiedliche Ergebnisse, z.B. jedes Feld aus den anderen Tabellen wird in einer eigenen Spalte ausgegeben (und viele NULLen kommen vor).
SELECT s.*
, table1.title --or whatever fields you want to show
, table2.name
, table3.lastname --etc
FROM stats s
LEFT JOIN $tableName1 table1
ON s.id = table1.id
AND s.tableName = '$tableName1'
LEFT JOIN $tableName2 table2
ON s.id = table2.id
AND s.tableName = '$tableName2'
LEFT JOIN $tableName3 table3
ON s.id = table3.id
AND s.tableName = '$tableName3'
--this is to ensure that omited tables statistics don't appear
WHERE s.tablename IN
( '$tableName1'
, '$tableName2'
, '$tableName3'
)
;
