//批量删除数据 function demo() { //实体名称 var entityname = "fw_student"; var data = []; data.push("8B1D93C6-BF1E-E411-9406-00155D005802"); data.push("20718494-0C2C-E411-9407-00155D005802"); executemultipleDelete(e
问题:sqlalchemy如何批量删除多条数据解决:使用参数synchronize_session=False,或for循环方法: users = self.db.query(User).filter(User.id.in_(1,2,3)).all() [self.db.delete(u) for u in users] self.db.commit()或 users = self.db.query(User).filter(User.id
批量删除2000w数据 使用delete from table太慢 //DELIMITER DROP PROCEDURE if EXISTS deleteManyTable; create PROCEDURE deleteManyTable() BEGIN DECLARE i int; ; DO ) ; SELECT SLEEP(0.5); ; end while; END; //DELIMITER CALL deleteManyTable(); 参考文献: http://mysql.rjweb
DECLARE @Table NVARCHAR(300) DECLARE @Count Int = 0 DECLARE tmpCur CURSOR FOR SELECT name FROM sys.objects WHERE TYPE='U' AND name LIKE N'temp_cost%' order by name OPEN tmpCur FETCH NEXT FROM tmpCur INTO @Table WHILE @@FETCH_STATUS= 0 BEGIN DECLARE @
) while(exists(select * from sysobjects where name like '表名前缀%')) begin select @name=name from sysobjects where name like '表名前缀%' exec ('drop table '+@name) end