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UPDATE ltkjpeisTest.tj_project a
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JOIN ltkjpeisTest.tj_project_beifen b ON b.pro_id = a.pro_id
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SET a.pro_default = b.pro_default,a.pro_scope = b.pro_scope,a.result_type = b.result_type;
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# 查看数据库占用内存大小
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SELECT table_schema AS 'Database',
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SUM(data_length + index_length) / 1024 / 1024 AS 'Size (MB)'
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FROM information_schema.tables
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WHERE table_schema = 'ltkjpeis10'
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GROUP BY table_schema;
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# 查看设置中预设的数据库内存大小
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SHOW VARIABLES LIKE 'innodb_buffer_pool_size';
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# 查看最大的连接数
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SHOW VARIABLES LIKE 'max_connections';
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