MySQL里面,delete和truncate都能清空表数据,保留表结构。但是这2个命令还是有些区别的。 二者的区别在于:即便是支持事务的环境下,delete的能回滚,truncate的回滚不了。 看下面的例子: > use hellodb; > select * from coc; 原始表内容如下: ##delete方式 > begin; > delete from co... ...
The article will overview the TRUNCATE TABLE statement in SQL on particular examples and describe the differences between the TRUNCATE,DELETE, and DROP statements. When you use the TRUNCATE TABLE statement, it simply removes data from the table but keeps the structure unchangeable, and makes entries...
Let's look at an example of how to use the TRUNCATE TABLE statement in SQL. In this example, we have a table calledsupplierswith the following data: supplier_idsupplier_namecitystate 100MicrosoftRedmondWashington 200GoogleMountain ViewCalifornia ...
F5执行,如图: 参考:http://blog.sqlauthority.com/2010/03/04/sql-server-rollback-truncate-command-in-transaction/ --EOF-- Author:兴百放 Web:http://xbf321.cnblogs.com/ Time:2010.3.12
SQL USE[tempdb]; GOCREATETABLETruncateTest (IDINTIDENTITY(1,1)NOTNULL); GOINSERTINTOTruncateTestDEFAULTVALUES; GO 3 在截斷之前檢查數據。 SQL SELECT*FROMTruncateTest; GO 截斷交易內的數據表,並檢查數據列數目。 SQL BEGINTRANSACTION;TRUNCATETABLETruncateTest;SELECT*FROMTruncateTest; ...
SQL training in Bangalorelets you learn about SQL concepts from expert. Enroll now! SQL Delete vs SQL Truncate Well, this how we work with Delete query inSQLand where to use Truncate command in SQL. The table below gives a quick difference between these two commands. ...
结果1 题目下面选项中,关于SQL语句truncate table user;的作用是解释,正确的是( ) A. 查询user表中的所有数据 B. 与“delete from user;“完全一样 C. 删除user表,并再次创建user表 D. 删除user表 相关知识点: 试题来源: 解析 D 反馈 收藏
当我尝试执行下面的sql statemant MariaDB时,给出一个错误: SQL: TRUNCATE $table CASCADE; SQLSTATE[42000]: Syntax error oraccess violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to yourMariaDB server version for the right syntax to use 浏览4提问于2017...
Use existing Directory Name:TMP_HF_DIR11:12:09:Recovering dataindatafile/u01/app/oracle/oradata/testdb1/users01.dbf11:12:09:Use existing Directory Name:TMP_HF_DIR11:12:39:1242truncated data blocks found.11:12:39:86968records recoveredinbackup tableTEST.TEST01$$11:12:39:Total:1242truncated...
SQL LIKE, IN SQL NOT IN SQL ORDER BY SQL Group Functions SQL GROUP BY SQL HAVING SQL INSERT SQL UPDATE SQL DELETE SQL CREATE DATABASE SQL USE DATABASE SQL ALTER DATABASE SQL DROP DATABASE SQL DATA TYPES SQL COMMAND Groups SQL CREATE TABLE SQL ALTER TABLE SQL Integrity Constrain SQL AUTO...