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我曾經在oracle中寫過如下的類似查詢,並且當時有效。現在我試着把它放在Derby JDBC的prepareStatement中。語法就像「select field1,field2,field3 from A where(a,b)in(select a,b from B)」,在derby jdbc中支持?
SELECT THREADID,THREADID2,SIMILARITY FROM S WHERE
(THREADID,THREADID2) IN
(
SELECT T1.ID,T2.ID FROM
(
(SELECT T.ID FROM T WHERE T.POSTTYPEID = '1' ORDER BY ANSWERCOUNT DESC FETCH FIRST 200 ROWS ONLY) AS T1
JOIN
(SELECT T.ID FROM T WHERE T.POSTTYPEID = '1' ORDER BY ANSWERCOUNT DESC FETCH FIRST 200 ROWS ONLY) AS T2
)
)
原來,我得到了錯誤爲:
java.sql.SQLSyntaxErrorException:語法錯誤:遇到 「」 第1行,列78
我查了代碼,並且此錯誤指向(THREADID,THREADID2)部分,它是否在JDBC Derby中不受支持?