私はこのようなクエリを持っています(いいえ、私のテーブルとフィールドはこれらの名前で呼び出されていませんが、構造は同じです)-
SELECT table1.id, table2.id, table1.phone1
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table1.phone1 IS NOT NULL AND LTRIM(RTRIM(table1.phone1)) <> ''
UNION
SELECT table1.id, table2.id, table1.phone2
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table1.phone2 IS NOT NULL AND LTRIM(RTRIM(table1.phone2)) <> ''
UNION
SELECT table1.id, table2.id, table2.phone
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table2.phone IS NOT NULL AND LTRIM(RTRIM(table2.phone)) <> ''
それはうまくいきます。しかし、そこから選択しようとすると(最終的にはグループバイなどで操作しようとしますが、今のところ単純な選択を試みました)、次のようになります。
SELECT * FROM
( SELECT table1.id, table2.id, table1.phone1
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table1.phone1 IS NOT NULL AND LTRIM(RTRIM(table1.phone1)) <> ''
UNION
SELECT table1.id, table2.id, table1.phone2
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table1.phone2 IS NOT NULL AND LTRIM(RTRIM(table1.phone2)) <> ''
UNION
SELECT table1.id, table2.id, table2.phone
FROM table1 LEFT OUTER JOIN
table3 ON table3.id = table1.id LEFT OUTER JOIN
table2 ON table3.id2 = table2.id
WHERE table2.phone IS NOT NULL AND LTRIM(RTRIM(table2.phone)) <> '' )
エラーが発生します:
Incorrect syntax near ')'.
私は何を間違っていますか?