MySQL查询数据库中没有主键的表
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select table_schema,table_name from information_schema.tables
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where (table_schema,table_name) not in(
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select distinct table_schema,table_name from information_schema.columns where COLUMN_KEY='PRI'
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)
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and table_schema not in (
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'sys','MySQL','information_schema','performance_schema'
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);
文章题目：MySQL查询数据库中没有主键的表
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