BEGINTRANSACTION;BEGINTRY-- 更新 Employees 表UPDATEEmployeesSETSalary=Salary*1.1WHEREDepartment='Sales';-- 更新 Departments 表UPDATEDepartmentsSETBudget=Budget+5000WHEREDepartment='Sales';COMMITTRANSACTION;-- 提交事务ENDTRYBEGINCATCHROLLBACKTRANSACTION;-- 回滚事务PRINTERROR_MESSAGE();-- 打印错误信息ENDCATCH;...
Multiple-table syntax: UPDATE [LOW_PRIORITY] [IGNORE] table_references SET assignment_list [WHERE where_condition] update语句的常规用法 updatestudentssetsname='abcd',gender='1'wheresid=1;updatestudent,studentssetstudents.sname=student2.sname,students.gender=students2.genderwherestudents.sid=students2.s...
Multiple-tablesyntax:#多表修改语句结构UPDATE[LOW_PRIORITY][IGNORE]table_referencesSETassignment_list[WHERE where_condition]Forthesingle-tablesyntax, theUPDATEstatement updates columnsofexisting rowsinthe namedtablewithnewvalues. TheSETclause indicates which columnstomodifyandthevaluesthey should be given. Eac...
Example: SQL UPDATE Statement Update Multiple Values in a Row We can also update multiple values in a single row at once. For example, -- update multiple values in the given rowUPDATECustomersSETfirst_name ='Johnny', last_name ='Depp'WHEREcustomer_id =1; Run Code Here, the SQL command ...
SET@name='John';SET@age=30;UPDATEusersSETname=@name,age=@ageWHEREid=1; 1. 2. 3. 4. 更新多个字段的状态图 下面是一个使用mermaid语法绘制的更新多个字段的状态图示例: UpdateFieldsUpdateSingle(choice)UpdateMultipleUpdateSingleFieldUpdateMultipleFields ...
Update TrnVendor Set Name = 'Vanix' Where VendId = 'TV001';To check the vendor name to see that it has changed, type: Select VendId, Name from TrnVendor where VendId = 'TV001';To commit the change, type: Commit work; Note: You can run multiple SQL statements at the same ...
报错:Update row with Key (id)=(xxxx) multiple times或者duplicate key value violates unique constraint 问题原因:违反唯一性约束,执行UPDATE、INSERT ON CONFLICT或INSERT操作时,主键存在重复数据。 解决方法: 若INSERT语法报错:可以改为INSERT INTO xx ON CONFLICT的语法,实现主键去重,详情请参见INSERT ON CONFLIC...
UPDATE Multiple Records It is theWHEREclause that determines how many records will be updated. The following SQL statement will update the ContactName to "Juan" for all records where country is "Mexico": Example UPDATECustomers SETContactName='Juan' ...
SQL Server 2005 (9.x) 在存取資料庫引擎的應用程式中導入了對 Multiple Active Result Set (MARS) 的支援。 在舊版的 SQL Server 中,資料庫應用程式無法在連接上維持多個作用中陳述式。 當使用 SQL Server 預設結果集時,應用程式必須從一個批次處理或取消所有結果集,然後才能夠在該連接上執行任何其他批次。
UPDATE Cities SET Location.X = 23.5 WHERE Name = 'Anchorage'; To modify different properties of the same user-defined type column, issue multiple UPDATE statements, or invoke a mutator method of the type. Updating FILESTREAM data You can use the UPDATE statement to update a FILESTREAM field...