by data_length desc, index_length desc;where table_schema='mysql
今日题目是一个中等难度的join有三个table分别是students,里面有每个
例:查看mysql库各表容量大小selecttable_schemaas'数据库', table
selecttable_schema as '数据库',sum(table_rows) as '记录数',sum
字段修改表本身:表本身可以修改:表名和表选项修改表名:rename table
Tips:Do Not Provide
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