oracle Update a table with data from another table UPDATEtable1 t1SET(name,desc)=(SELECTt2.name, t2.descFROMtable2 t2WHEREt1.id=t2.id)WHEREEXISTS(SELECT1FROMtable2 t2WHEREt1.id=t2.id ) Assuming thejoinresultsinakey-preservedview, you could alsoUPDATE(SELECTt1.id, t1.name name1, t1.descdesc1, t2.name name...
例如,UPDATE my_table SET column1 = 'new_value1', column2 = 'new_value2' WHERE condition;。在SET子句中,可以使用常量、表达式、子查询等来指定新值。例如,UPDATE my_table SET column1 = (SELECT another_column FROM another_table WHERE condition) WHERE condition;。这种灵活性使得SET子句可以处理各种...
We can UPDATE a table with data from any other table in SQL. Let us consider the following two tables. CREATE TABLE student_old ( student_id INT ,
UPDATE TABLEA SET b = TABLEB.b1, c = TABLEB.c1, d = TABLEB.d1 FROM TABLEA, TABLEB WHERE TABLEA.a = TABLEB.a1 AND TABLEB.e1 > 40 GO Note: This is an extension in SQL Server i.e. the FROM clause – it does make it simple to understand and is a nice feature. Results a...
在SQL Server 中,使用别名来更新表或列的语法如下: UPDATEtable_aliasSETcolumn_alias=new_valueFROMtable_name table_aliasJOINanother_table_name another_table_aliasONtable_alias.column_alias=another_table_alias.column_aliasWHEREcondition; 1. 2.
问UPDATE table with SELECT from another，但字段为SUM(someField)ENCREATE TABLE "TEST6" ( ...
A. Using the UPDATE statement with information from another table The following example modifies the SalesYTD column in the SalesPerson table to reflect the most recent sales recorded in the SalesOrderHeader table. USE AdventureWorks2008R2; GO UPDATE Sales.SalesPerson SET SalesYTD = SalesYTD + Sub...
Examples in this section demonstrate methods of updating rows from one table based on information in another table. N. Using the UPDATE statement with information from another table The following example modifies the SalesYTD column in the SalesPerson table to reflect the most recent sales recorded ...
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' Column...
Examples in this section demonstrate methods of updating rows from one table based on information in another table. N. Using the UPDATE statement with information from another table The following example modifies the SalesYTD column in the SalesPerson table to reflect the most recent sales recorded ...