11 2019 档案
摘要:SELECT CURDATE() AS '时间' (CASE WHEN Days=0 THEN '0' WHEN 1<=Days AND Days<=15 THEN '1-15' WHEN 16<=Days AND Days<=30 THEN '16-30' WHEN 31<=Days AND Days<=60 THEN '31-60' WHEN 61<=Days AND Days<=90 THE
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摘要:select count(1) from information_schema.COLUMNS where TABLE_SCHEMA='$databaseName' and table_name = '$tableName'
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摘要:1.1全库备份 1.2清除库中某张表的信息-查询结果为空; 1.3全库恢复 1.4验证:查询1.2步骤清除数据的表-有结果;
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