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chenhe96
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GUEST, unregistred user!
SQL 语句如下:
DecisionQuery1.SQL.Text:='select 类别,读者级别,count(登录号) as 借阅量 from chliutongrzh where (读者级别 is not null) and (类别 is not null) and (year(处理时间)='+ComboBox1.Text+') group by 类别,读者级别 order by 类别,读者级别'
第一次编译后提示:
...EDBEngineError with message 'Invalid use of keyword',Process Stopped...
当再编译时,却可以出现结果,这是怎么回事?
DecisionQuery1.SQL.Text:='select 类别,读者级别,count(登录号) as 借阅量 from chliutongrzh where (读者级别 is not null) and (类别 is not null) and (year(处理时间)='+ComboBox1.Text+') group by 类别,读者级别 order by 类别,读者级别'
第一次编译后提示:
...EDBEngineError with message 'Invalid use of keyword',Process Stopped...
当再编译时,却可以出现结果,这是怎么回事?