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, t...
FROM another_table WHERE condition; 代码语言:txt 复制 其中,table_name是需要更新的目标表的名称,column1、column2等是目标表中需要更新的列名,another_table是包含需要更新数据的源表的名称,condition是筛选条件。 接下来,可以使用Oracle的UPDATE语句来更新目标表中的数据。该语句可以根据特定条件更新目标表...
UPDATEtable1 t1SET(name,desc)=(SELECT, t2.descFROMtable2 t2WHERE=)WHEREEXISTS(SELECT1FROMtable2 t2WHERE=) Assuming thejoinresultsinakey-preservedview, you could alsoUPDATE(SELECT, name1, t1.descdesc1, name2, t2.descdesc2FROMtable1 t1, table2 t2WHERE=)SETname1=name2, desc1=desc2 2....
A: 如果UPDATE语句中没有指定WHERE条件,将更新表中的所有记录,这可能导致数据丢失或错误,因此请务必谨慎使用。 2、Q: 如何在UPDATE语句中使用子查询? A: 在UPDATE语句的SET子句中,可以使用子查询来获取要设置的新字段值。SET column_name = (SELECT column_name FROM another_table)。 3、Q: 如果需要更新的记...
SQL> update dept set loc = 'new york' where deptno = 70; 1 row updated. SQL> select * from dept; 四、DELETE语句 DELETE [FROM] tablename [WHERE condition]; SQL> delete from dept where deptno = 60; 1 row deleted. 参考资料
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Expand table InformationDescription Oracle Home This is the path to the install directory for the Oracle software. Accept the default (C:\oracle\ora90 or similar) or enter another path. For more information about the Oracle Home, see the section "Considerations for Oracle Home" later in this...