How to use postgresql generated generated always COLUMN ?

From: "tank(dot)zhang" <6220104(at)qq(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: How to use postgresql generated generated always COLUMN ?
Date: 2016-12-31 04:29:48
Message-ID: 1483158588371-5936872.post@n3.nabble.com
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DB2 operation:

db2 "create table emp(id int,name char(10),salary int,rev_salary integer
generated always as (salary*50/100))"

[db2inst2(at)db2 ~]$ db2 "insert into emp(id,name,salary)
values(100,'asdf',51100)"

[db2inst2(at)db2 ~]$ db2 "select * from emp"

ID NAME SALARY REV_SALARY
----------- ---------- ----------- -----------
100 asdf 500 250
100 asdf 6600 3300
100 asdf 51100 25550

*How to use postgresql implement?*

Thank you!

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