SQL DELETEProduction.ProductCostHistoryWHEREStandardCostBETWEEN12.00AND14.00ANDEndDateISNULL; PRINT 'Number of rows deleted is ' + CAST(@@ROWCOUNT as char(3)); C. 使用游标以确定要删除的行 以下示例使用名为EmployeePayHistory的游标
我们可以采取以下步骤: -- 开始一个事务BEGINTRANSACTION;-- 假设执行了误删除操作DELETEFROMemployeesWHEREid=1;-- 查看日志中的操作记录SELECT*FROMfn_dblog(NULL,NULL)WHEREOperation='LOP_DELETE_ROWS';-- 如果确认要撤销,则可以进行回滚ROLLBACKTRANSACTION; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...
SQL database in Microsoft Fabric Removes one or more rows from a table or view in SQL Server. Transact-SQL syntax conventions Syntax syntaxsql -- Syntax for SQL Server and Azure SQL Database[WITH<common_table_expression>[ ,...n ] ]DELETE[TOP( expression ) [PERCENT] ] [FROM] { {table...
接下来,我们可以使用以下代码来查看已删除的数据: -- 使用系统函数和视图查看已删除的数据SELECT[CurrentLSN],[TransactionID],[BeginTime],[EndTime],[TransactionName],[TransactionSID]FROMsys.fn_dblog(NULL,NULL)WHERE[Operation]='LOP_DELETE_ROWS'AND[AllocUnitName]='dbo.TestTable' 1. 2. 3. 4. 5....
TRUNCATERemoves all rows from a table without logging the individual row deletions Tips to optimize SQL Server deletes 1) Issue Table lock to avoid doing loads of row locks . Using a table hint , such as TABLOCK or TABLOCKX. Keep in mind – there may already be other transactions in prog...
代码语言:sql AI代码解释 SELECT * FROM Customers WHERE Country='Germany' FETCH FIRST 3 ROWS ONLY; 添加ORDER BY 关键字 在要对结果进行排序并返回排序后结果的前 3 条记录时,添加 ORDER BY 关键字。 对于SQL Server 和 MS Access: 代码语言:sql AI代码解释 按CustomerName 字母降序排序结果,并返回前 3...
Delete Command in SQL Server The simplest syntax of the statement is as follows: Delete FROM <TableName> WHERE <Condition> You need to provide the table name and the criteria/condition for the data (rows) deletion from the table. Note: It is crucial to use the DELETE statement with a co...
SELECT*FROMCustomers FETCHFIRST3ROWSONLY; 使用旧版 Oracle 的 ROWNUM 以下SQL 语句展示了旧版 Oracle 的等效示例: 选择"Customers" 表的前 3 条记录: SELECT*FROMCustomers WHEREROWNUM<=3; 添加WHERE 子句 以下SQL 语句从 "Customers" 表中选择前三条记录,其中国家是 "Germany"(对于 SQL Server/MS Access)...
Applies to: SQL ServerDelete rows in the Results pane if you want to delete records in the database. If you want to delete all of the rows you can use a Delete query. For more information see Create Delete Queries (Visual Database Tools). If you only want to remove rows from the Re...
Let’s check which rows got deleted. select * from customers2 go Scenario 2.b: Delete all duplicate records but keep the first original one Let’s first truncate the customers2 table and add the same rows again. Truncate Table customers2 go ...