如何用WHERE子句中的SELECT语句编写SQL DELETE语句？

数据库：Sybase Advantage 11

在我寻求规范化数据，我试图删除从这个SELECT语句得到的结果： 

 SELECT tableA.entitynum FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date') ;

这是我提出的DELETE语句： 

 DELETE FROM tableA WHERE (SELECT q.entitynum FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date')) ;

当我尝试运行这个语句时，我不断得到这个错误： 

 ERROR IN SCRIPT: poQuery: Error 7200: AQE Error: State = S0000; NativeError = 2124; [iAnywhere Solutions][Advantage SQL Engine]Invalid operand for operator: = Boolean value cannot be operated with non-Boolean value.

我也试过这个说法： 

 DELETE FROM tableA INNER JOIN tableB u on (u.qlabel = tableA.entityrole AND u.fieldnum = tableA.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR tableA.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date') ;

其结果是： 

 ERROR IN SCRIPT: poQuery: Error 7200: AQE Error: State = 42000; NativeError = 2117; [iAnywhere Solutions][Advantage SQL Engine] Unexpected token: INNER -- Expecting semicolon. -- Location of error in the SQL statement is: 23 (line: 2 column: 1)

有人可以帮助我正确构build一个DELETE查询，这将导致正确的数据被删除？

您需要确定TableA中的主键以删除正确的logging。 主键可以是单个列，也可以是多个列的唯一标识表中的行的组合。 如果没有主键，则可以使用ROWID伪列作为主键。 

 DELETE FROM tableA WHERE ROWID IN ( SELECT q.ROWID FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date'));

你不应该有： 

 DELETE FROM tableA WHERE entitynum IN (...your select...)

现在你只是有一个没有比较的地方： 

 DELETE FROM tableA WHERE (...your select...)

所以你的最终查询将是这样的; 

 DELETE FROM tableA WHERE entitynum IN ( SELECT tableA.entitynum FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date') )

在这种情况下： 

 DELETE FROM tableA WHERE (SELECT q.entitynum FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date'));

你是不是错过了你想比较的列？ 例： 

 DELETE FROM tableA WHERE entitynum in (SELECT q.entitynum FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date'));

我假设它是那个列，因为在你select的语句中，你要从同一个表中select你想要从那个列中删除的表。

曾经有过这样的事情： 

 CREATE TABLE exclusions(excl VARCHAR(250)); INSERT INTO exclusions(excl) VALUES ('%timeline%'), ('%Placeholders%'), ('%Stages%'), ('%master_stage_1205x465%'), ('%Accessories%'), ('%chosen-sprite.png'), ('%WebResource.axd'); GO CREATE VIEW ToBeDeleted AS SELECT * FROM chunks WHERE chunks.file_id IN ( SELECT DISTINCT lf.file_id FROM LargeFiles lf WHERE lf.file_id NOT IN ( SELECT DISTINCT lf.file_id FROM LargeFiles lf LEFT JOIN exclusions e ON(lf.URL LIKE e.excl) WHERE e.excl IS NULL ) ); GO CHECKPOINT GO SET NOCOUNT ON; DECLARE @r INT; SET @r = 1; WHILE @r>0 BEGIN DELETE TOP (10000) FROM ToBeDeleted; SET @r = @@ROWCOUNT END GO

我调整了你的第二个查询，使其工作。 我认为这比在其他答案中使用嵌套的SELECT语句更直接。 

 DELETE q FROM tableA q INNER JOIN tableB u on (u.qlabel = q.entityrole AND u.fieldnum = q.fieldnum) WHERE (LENGTH(q.memotext) NOT IN (8,9,10) OR q.memotext NOT LIKE '%/%/%') AND (u.FldFormat = 'Date')

更多细节在这里：
如何使用INNER JOIN与SQL Server删除？

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