将mysql查询转换为等效的sql server特定查询（）

Question

以下是MySQL查询，

DELETE FROM ATTRIBUTE_INSTANCE 
WHERE ATTRIBUTE_INSTANCE.ATTRIBUTE_NAME 
IN 
( SELECT CONCAT(ATTRIBUTE_TEMPLATE.TEMPLATE_ID,'.',ATTRIBUTE_TEMPLATE.ATTRIBUTE_NAME) 
  FROM ATTRIBUTE_TEMPLATE, TEMP_ENTITY_TABLE 
WHERE ATTRIBUTE_TEMPLATE.TEMPLATE_ID=TEMP_ENTITY_TABLE.ENTITY_ID
);

我想将它转换为等效的sql server查询，但我没能实现。你能帮我吗？

感谢

Answer 1

失败的唯一原因是因为CONCAT mysql函数，所以TSQL使用+代替CONCAT

DELETE FROM ATTRIBUTE_INSTANCE 
WHERE ATTRIBUTE_INSTANCE.ATTRIBUTE_NAME IN 
( 
  SELECT ATTRIBUTE_TEMPLATE.TEMPLATE_ID + '.' + ATTRIBUTE_TEMPLATE.ATTRIBUTE_NAME
  FROM   ATTRIBUTE_TEMPLATE, TEMP_ENTITY_TABLE 
  WHERE  ATTRIBUTE_TEMPLATE.TEMPLATE_ID=TEMP_ENTITY_TABLE.ENTITY_ID
)

或者，您也可以使用Join进行DELETE，

DELETE  a
FROM    ATTRIBUTE_INSTANCE  a
        INNER JOIN 
        ( 
            SELECT ATTRIBUTE_TEMPLATE.TEMPLATE_ID + '.' + 
                   ATTRIBUTE_TEMPLATE.ATTRIBUTE_NAME As ColumnName
            FROM   ATTRIBUTE_TEMPLATE 
                    INNER JOIN TEMP_ENTITY_TABLE 
                        ON ATTRIBUTE_TEMPLATE.TEMPLATE_ID = TEMP_ENTITY_TABLE.ENTITY_ID
        ) b ON a.ATTRIBUTE_NAME = b.ColumnName