How to view DB2 Table structure

Question

How to view the table structure in DB2 database

Answer 1

1.use db2 describe table

  db2 describe table tabschema.tabname

2.use db2 describe output

  db2 "describe select * from tabschema.tabname"

3.use db2look utility

  db2look -d dbname -e -t tabname

4.find rows in db2 syscat

  db2 "Select * from syscat.columns wher tabname='' and tabschema =''"

Answer 2

Control Center already got the feature of that. It's just below the table list.

Answer 3

I am using Aquadata Studio 12.0.23, which is several versions short of the newest. So your experience may be better than mine. I found that the best way to get an overview was to use the ERD generator. It took a couple of hours, since normalization was not a concept used in the design of this database almost 30 years ago. I was able to get definitions for all of the objects in a few hours, with a file for each.

Answer 4

I am running DB2/LINUXX8664 10.5.3 and describe select * from schema_name.table_name works for me.

However, describe table schema_name.table_name fails with this error:

SQL0100W No row was found for FETCH, UPDATE or DELETE; or the result of a query is an empty table. SQLSTATE=02000

Answer 5

How to view the table structure in db2 database

Open db2 command window, connect to db2 with following command.

> db2 connect to DATABASE_NAME USER USERNAME USING PASSWORD

Once you connected successfully, issue the following command to view the table structure.

> db2 "describe select * from SCHEMA_NAME.TABLE_NAME"

The above command will display db2 table structure in tabular format.

Note: Tested on DB2 Client 9.7.11

Answer 6

drop view lawmod9t.vdesc

create view lawmod9t.vDesc as select 
       upper(t.table_cat) as Catalog, 
       upper(t.table_schem) as Schema, 
       upper(t.table_name) as table, 
       t.table_text as tableDesc, 
       c.system_column_name as colname_short, 
       c.column_name as colname_long, 
       c.column_text as coldesc, 
       c.Type_Name as type, 
       c.column_Size as size
from sysibm.SQLColumns c
inner join sysibm.sqltables t
on c.table_schem = t.table_schem
and c.table_name = t.table_name

select * from vdesc where table = 'YPPPOPL'