第七十七章 SQL命令 TRUNCATE TABLE 从表中删除所有数据并重置计数器。 大纲 TRUNCATE TABLE [restriction] tablename 参数 restriction - 可选—以下限制关键字中的一个或多个,用空格隔开:%NOCHECK, %NOLOCK。 tablename - 要从中删除所有行的表。 还可以指定一个可更新视图,通过该视图可以删除表中的所有行。
%StatementTypeName," rowcount ",rset.%ROWCOUNT," RowID ",rset.%ROWID,! &sql(DROP TABLE SQLUser.MyStudents1) } 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DHC-APP>d ##class(PHA.TEST.SQLCommand).TruncateTable() CREATE TABLE INSERT rowcount 41 DELETE rowcount 41 INSERT rowcount 1 ...
如果需要日志记录和回滚TRUNCATE TABLE选项,则必须显式指定START TRANSACTION,并以显式COMMIT或rollback结束。 这与SET TRANSACTION %COMMITMODE= NONE或0(没有自动事务)相同——调用TRUNCATE TABLE时不会启动任何事务。 失败的TRUNCATE TABLE操作可能会使数据库处于不一致的状态,一些行被删除,一些行没有被删除。 要在...
The TRUNCATE TABLE statement is used to delete the data inside a table, but not the table itself.SyntaxTRUNCATE TABLE table_name; Exercise? What does the SQL DROP TABLE statement do? Deletes a table and all its data from the database Renames an existing table Copies a table and its ...
SQL statement truncate table is used to delete the records of the table but the table structure is not deleted and you can again insert values in that table. Example of truncate table truncate table table_name Example of top statement truncate table employee_detail SUMMARY In this chapter, yo...
Here, the SQL command will delete a table namedShippings. Also, make sure you haveadminorDROPpermission to run this command. DROP TABLE Syntax The syntax of the SQLDROP TABLEstatement is: DROPTABLEtable_name; Here,table_nameis the name of the table to be removed. ...
TruncateTableStatement TruncateTableStatement 构造函数 属性 方法 TruncateTargetTableSwitchOption TryCastCall TryCatchStatement TryConvertCall TryParseCall TSEqualCall TSql100Parser TSql110Parser TSql120Parser TSql130Parser TSql140Parser TSql150Parser TSql80Parser TSql90Parser TSqlAuditEvent...
TruncateTableStatement 类 TruncateTableStatement 类 TruncateTableStatement 构造函数 TruncateTableStatement 方法 TruncateTableStatement 属性 TryCatchStatement 类 TSEqualCall 类 TSql100Parser 类 TSql100ParserConstructor 类 TSql80Parser 类 TSql80ParserConstructor 类 TSql90Parser 类 TSql90ParserConstructor 类...
To delete all the rows from employee table, the query would be like, TRUNCATE TABLE employee; Difference between DELETE and TRUNCATE Statements:DELETE Statement: This command deletes only the rows from the table based on the condition given in the where clause or deletes all the rows from ...
To truncate a partitioned table, the table and indexes must be aligned (partitioned on the same partition function). Remarks Compared to theDELETEstatement,TRUNCATE TABLEhas the following advantages: Less transaction log space is used. TheDELETEstatement removes rows one at a time and records an...