这段sql 如何做个优化呢,求帮助。。。

岁月如灬风 发布于 10/23 10:11
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capgrade = (select capgrade from tb_tpost_userpost where mpostid = s.mpostid and spostid = s.spostid and idcard = r.idcard) nvl(capgrade, 0) != nvl((select capgrade from tb_tpost_userpost where mpostid = s.mpostid and spostid = s.spostid and idcard = r.idcard), 0)
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