Question

我有一个适用于Oracle数据库的Oracle查询。但是当我试图将其转移到MySQL时，我有语法错误，我无法理解错误的位置。

Oracle查询：

DELETE FROM tec_valid_codes
               WHERE code IN
                        (SELECT a.oldacctnbr
                           FROM tec_onoff_file a,
                                tec_onoff_file b,
                                tec_valid_codes c
                          WHERE     a.curracctnbr = b.curracctnbr
                                AND a.oldacctnbr <> b.oldacctnbr
                                AND a.transtype = 'COMB'
                                AND b.transtype = 'COMB'
                                AND a.oldacctnbr = c.code
                         MINUS
                           SELECT MAX (c.oldacctnbr)
                             FROM tec_valid_codes tvc,
                                  (SELECT a.oldacctnbr, a.curracctnbr
                                     FROM tec_onoff_file a, tec_onoff_file b
                                    WHERE     a.curracctnbr = b.curracctnbr
                                          AND a.oldacctnbr <> b.oldacctnbr
                                          AND a.transtype = 'COMB'
                                          AND b.transtype = 'COMB') c
                            WHERE tvc.code = c.oldacctnbr
                         GROUP BY curracctnbr);

我的MySQL查询，无效：

DELETE FROM tec_valid_codes vc
                WHERE vc.code IN
                    (SELECT t1.oldacctnbr FROM
                        (SELECT a.oldacctnbr
                        FROM tec_onoff_file a,
                            tec_onoff_file b,
                            tec_valid_codes c
                        WHERE a.curracctnbr = b.curracctnbr
                        AND a.oldacctnbr <> b.oldacctnbr
                        AND a.transtype = 'COMB'
                        AND b.transtype = 'COMB'
                        AND a.oldacctnbr = c.code) as `t1`
                    WHERE t1.oldacctnbr NOT IN 
                       (SELECT MAX(c.oldacctnbr)
                        FROM tec_valid_codes tvc,
                            (SELECT a.oldacctnbr, a.curracctnbr
                            FROM tec_onoff_file a, tec_onoff_file b
                            WHERE a.curracctnbr = b.curracctnbr
                            AND a.oldacctnbr <> b.oldacctnbr
                            AND a.transtype = 'COMB'
                            AND b.transtype = 'COMB') as `c`
                        WHERE tvc.code = c.oldacctnbr)
                    GROUP BY vc.curracctnbr);

我在这一行有错误：

'vc
   WHERE vc.code IN
     (SELECT t1.oldacctnbr FROM
        (SELECT a.oldacctn'

我在这里看不到语法错误。我哪里错了？我的MySQL查询是否正常工作？

已编辑：我的解决方案：

DELETE FROM tec_valid_codes
            WHERE code IN
                (SELECT t1.oldacctnbr FROM
                    (SELECT a.oldacctnbr
                    FROM tec_onoff_file a,
                        tec_onoff_file b,
                        tec_valid_codes c
                    WHERE a.curracctnbr = b.curracctnbr
                    AND a.oldacctnbr <> b.oldacctnbr
                    AND a.transtype = 'COMB'
                    AND b.transtype = 'COMB'
                    AND a.oldacctnbr = c.code) as `t1`)
            AND code NOT IN
                (SELECT t2.oldcode FROM
                   (SELECT MAX(c.oldacctnbr) as oldcode 
                    FROM tec_valid_codes tvc,
                        (SELECT a.oldacctnbr, a.curracctnbr
                        FROM tec_onoff_file a, tec_onoff_file b
                        WHERE a.curracctnbr = b.curracctnbr
                        AND a.oldacctnbr <> b.oldacctnbr
                        AND a.transtype = 'COMB'
                        AND b.transtype = 'COMB') as `c`
                    WHERE tvc.code = c.oldacctnbr
                    GROUP BY curracctnbr) as `t2`);

查询是否正确？

Answer 1

你最后（至少）犯了一个小错误：

GROUP BY vc.curracctnbr

应该来自t1：

GROUP BY t1.curracctnbr

将Oracle查询更改为MySQL - 语法错误

1 个答案: