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7 lines
301 B
7 lines
301 B
ALTER TABLE stream_proxy ADD status bit(1) not null;
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# 去除子查询优化查询速度
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alter table device_channel
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add subCount int default 0 null;
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update device_channel dc set dc.subCount = (select te.count from (SELECT count(0) as count FROM device_channel WHERE parentId = dc.channelId) te)
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