Oracle update and order

Source: Internet
Author: User
Tags dname

Oracle update and order

Today, I encountered a problem about converting SQL statements into Oracle statements, which is described as follows:

Select * from emp order by deptno;

Select * from dept;

SQL Server:

Update dept a set dname = (select top 1 ename from emp where deptno = a. deptno order by sal)

After trying to find the information, the following conversion result is obtained. I don't know if this is feasible:

Update dept a set dname =

(With t as (select ename, deptno from emp order by sal)

Select ename from t where deptno = a. deptno and rownum = 1)

Where exists (with t as (select ename, deptno from emp order by sal)

Select null from t where deptno = a. deptno)

Execution result:

Select * from dept;

Other alternative methods will be followed.

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