// partitioned table or an ALTER TABLE EXCHANGE PARTITION. // *Action: Before performing the above operations the table, disable the // foreign key constraints in other tables. You can see what // constraints are referencing a table by issuing the following // command: // SELECT * FROM U...
To delete all the rows from the employee table, the query would be like, DELETE FROM employee; SQL TRUNCATE StatementThe SQL TRUNCATE command is used to delete all the rows from the table and free the space containing the table.Syntax to TRUNCATE a table:TRUNCATE TABLE table_name; ...
Truncate a Table 截表 What if we only want to get rid of the data inside a table, and not the table itself? Use the TRUNCATE TABLE command (deletes only the data inside the table): 当我们只想将表内的数据做完成清楚而保留其内部结构的话,可以使用TRUNCATE TABLE命令(仅仅删除表中的数据) TR...
TheDROP TABLEcommand deletes a table in the database. The following SQL deletes the table "Shippers": Example DROPTABLEShippers; Try it Yourself » TRUNCATE TABLE TheTRUNCATE TABLEcommand deletes the data inside a table, but not the table itself. ...
TheTRUNCATE TABLEcommand deletes the data inside a table, but not the table itself. The following SQL truncates the table "Categories": Example TRUNCATETABLECategories; ❮Previous❮ SQL KeywordsReferenceNext❯ Track your progress - it's free!
再次检查表TruncateTable --回滚之后再次检查TruncateTableSELECT*FROMTruncateTabelGO 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/ ...
truncate table 表名:清空一张表的所有数据。 create table 表名 like 要复制的表名:复制一张表的结构,然后创建一张新表。 create table 表名 as select * from 要复制的表名:同时复制表结构和数据创建新表。 1.4、表的分析、检查、修复与优化操作 MySQL本身提供了一系列关于表的分析、检查与优化命令: ①分...
CREATETABLEbookshelf(BOOK_IDNUMBER,BOOK_NAMEVARCHAR2(100),BOOK_TYPEVARCHAR2(100),AUTHORVARCHAR2(100),INTIMEDATE); 表名为:bookshelf,有列:图书id,图书名称,图书类型,作者,入库时间。通过上面学习的SELECT语法,来查询一下这张表: SELECT * FROM bookshelf; ...
Delta Lake does not support partition clauses for TRUNCATE.If the table is cached, the command clears cached data of the table and all its dependents that refer to it. The cache will be lazily filled when the table or the dependents are accessed the next time.Syntax...
CommandOptions CommandSecurityElement80 CommitTransactionStatement CommonTableExpression CompositeGroupingSpecification CompressionDelayIndexOption CompressionDelayTimeUnit CompressionEndpointProtocolOption CompressionPartitionRange ComputeClause ComputeFunction ComputeFunctionType ConstraintDefinition ConstraintEnforcement ContainmentDat...