Getting list of tables, and fields in each, in a database

0 votes
asked Jan 7, 2009 by dotnetdev

I'm looking at creating a basic ORM (purely for fun), and was wondering, is there a way to return the list of tables in a database and also the fields for every table?

Using this, I want to be able to loop through the result set (in C#) and then say for each table in the result set, do this (e.g. use reflection to make a class that will do or contain xyz).

Further to this, what are some good online blogs for SQL Server? I know this question is really about using system SPs and databases in Sql Server, and I am ok with general queries, so I'm interested in some blogs which cover this sort of functionality.

Thanks

11 Answers

0 votes
answered Jan 7, 2009 by zombiesheep

Tables ::

SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'

columns ::

SELECT * FROM INFORMATION_SCHEMA.COLUMNS 

or

SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='your_table_name'
0 votes
answered Jan 7, 2009 by jeremydwill
SELECT * FROM INFORMATION_SCHEMA.COLUMNS
0 votes
answered Jan 7, 2009 by zombiesheep

Your other inbuilt friend here is the system sproc SP_HELP.

sample usage ::

sp_help <MyTableName>

It returns a lot more info than you will really need, but at least 90% of your possible requirements will be catered for.

0 votes
answered Jan 7, 2009 by brendan

This will get you all the user created tables:

select * from sysobjects where xtype='U'

To get the cols:

Select * from Information_Schema.Columns Where Table_Name = 'Insert Table Name Here'

Also, I find http://www.sqlservercentral.com/ to be a pretty good db resource.

0 votes
answered Jan 7, 2009 by j-random-hacker

One advantage of the INFORMATION_SCHEMA approach is that it is quite portable across different databases.

0 votes
answered Jan 7, 2009 by marlonribunal

Is this what you are looking for:

Using OBJECT CATALOG VIEWS

 SELECT T.name AS Table_Name ,
       C.name AS Column_Name ,
       P.name AS Data_Type ,
       P.max_length AS Size ,
       CAST(P.precision AS VARCHAR) + '/' + CAST(P.scale AS VARCHAR) AS Precision_Scale
FROM   sys.objects AS T
       JOIN sys.columns AS C ON T.object_id = C.object_id
       JOIN sys.types AS P ON C.system_type_id = P.system_type_id
WHERE  T.type_desc = 'USER_TABLE';

Using INFORMATION SCHEMA VIEWS

  SELECT TABLE_SCHEMA ,
       TABLE_NAME ,
       COLUMN_NAME ,
       ORDINAL_POSITION ,
       COLUMN_DEFAULT ,
       DATA_TYPE ,
       CHARACTER_MAXIMUM_LENGTH ,
       NUMERIC_PRECISION ,
       NUMERIC_PRECISION_RADIX ,
       NUMERIC_SCALE ,
       DATETIME_PRECISION
FROM   INFORMATION_SCHEMA.COLUMNS;

Reference : My Blog - http://dbalink.wordpress.com/2008/10/24/querying-the-object-catalog-and-information-schema-views/

0 votes
answered Jan 31, 2012 by shels

Get list of all the tables and the fields in database:

Select *
From INFORMATION_SCHEMA.COLUMNS
Where TABLE_CATALOG Like 'DatabaseName'

Get list of all the fields in table:

Select *
From INFORMATION_SCHEMA.COLUMNS
Where TABLE_CATALOG Like 'DatabaseName' And TABLE_NAME Like 'TableName' 
0 votes
answered Jan 10, 2016 by tony-gallone

This will return the database name, table name, column name and the datatype of the column specified by a database parameter:

declare @database nvarchar(25)
set @database = ''

SELECT cu.table_catalog,cu.VIEW_SCHEMA, cu.VIEW_NAME, cu.TABLE_NAME,   
cu.COLUMN_NAME,c.DATA_TYPE,c.character_maximum_length
from INFORMATION_SCHEMA.VIEW_COLUMN_USAGE as cu
JOIN INFORMATION_SCHEMA.COLUMNS as c
on cu.TABLE_SCHEMA = c.TABLE_SCHEMA and c.TABLE_CATALOG = 
cu.TABLE_CATALOG
and c.TABLE_NAME = cu.TABLE_NAME
and c.COLUMN_NAME = cu.COLUMN_NAME
where cu.TABLE_CATALOG = @database
order by cu.view_name,c.COLUMN_NAME
0 votes
answered Jan 24, 2016 by jie

I tested a few solutions an found that

Select *
From INFORMATION_SCHEMA.COLUMNS

gives you the column info for your CURRENT/default database.

Select *
From <DBNAME>.INFORMATION_SCHEMA.COLUMNS

, without the < and >, gives you the column info for the database DBNAME.

0 votes
answered Sep 15, 2017 by selenium

I found an easy way to fetch the details of Tables and columns of a particular DB using SQL developer.

Select *FROM USER_TAB_COLUMNS
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