VIEWCOLUMNS 
Use of the system table DOMAIN.VIEWCOLUMNS
Prerequisites
You can use the demo data for the SQL tutorial. Start the Database Studio as database administrator MONA with the password RED and log on to demo database DEMODB: Logging On to a Database.
Define view tables. Proceed as described in SQL Tutorial, View Tables.
Activities
You can use Database Studio to enter and execute SQL statements. More information: Working with SQL Statements: Overview
Note the General Instructions for formulating SQL statements.
You can use the system table VIEWCOLUMNS to determine the following database information, among other things:
All tables on which the view table CUSTOMER_ADDR is based
SELECT tablename, viewcolumnname, columnname
FROM DOMAIN.VIEWCOLUMNS
WHERE schemaname = 'HOTEL'
AND viewname = 'CUSTOMER_ADDR'
Column of the table on which the CITYcolumn of the view table CUSTOMER_ADDR is based
SELECT tablename, columnname
FROM DOMAIN.VIEWCOLUMNS
WHERE schemaname = 'HOTEL'
AND viewname = 'CUSTOMER_ADDR'
AND viewcolumnname = 'CITY'
Determining whether the TITLE column of the CUSTOMERtable is used in a view table
SELECT schemaname, viewname, viewcolumnname
FROM DOMAIN.VIEWCOLUMNS
WHERE tablename = 'CUSTOMER'
AND columnname = 'TITLE'