使用CTE在一条语句中从两个表中删除：
WITH x AS ( DELETe FROM parent WHERe ... RETURNING id)DELETe FROM childWHERe ...;
使用CTE在一条语句中从两个表中删除：
WITH x AS ( DELETe FROM parent WHERe ... RETURNING id)DELETe FROM childWHERe ...;
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