js时间格式转化 2019-12-03T15:53:23.000+08:00 转化为 YYYY MM DD var dateee = new Date(createTime).toJSON();var date = new Date(+new Date(dateee)+8*3600*1000).toISOString().replace(/T/g,' ').replace(/\.[\d]{3}Z/,'')
Mysql查询库.表存储量(Size) 1.要查询表所占的容量,就是把表的数据和索引加起来就可以了. SELECT SUM(DATA_LENGTH) + SUM(INDEX_LENGTH) FROM information_schema.tables WHERE table_schema='table_name'; 2.查询所有的数据大小 ), ), 'M') FROM tables; 3.查询某个表的数据 ),),'M') FROM tables WHERE table_schema='dat
// Validates that the input string is a valid date formatted as "mm/dd/yyyy" function isValidDate(dateString) { // First check for the pattern if (!/^\d{1,2}\/\d{1,2}\/\d{4}$/.test(dateString)) { return false; } // Parse the date parts to intege
折腾了半天终于把这个给折腾顺了,但是后来发现用不了竟然...悲剧啊,但是还是要记录下加深记忆 insert into table1 (field1, field2,field3) select ?field1,?field2,?field3 from temp where not exists (select field1,field2,field3 from table1 where field1=?field1 and field2=?field2 and field3=?field3);
