Equivalent query in sql server for INFORMATION_SCHEMA - mysql

Question

I am working on a page where we need to visually compare the schema of same table across the two database-one in sql server and other in mysql.I have to include indexes as well.
now mysql query shows info along with indexes -
select column_name,column_type,table_name,column_key
from INFORMATION_SCHEMA.COLUMNS where table_name = 'tbl_ClientDN'
But for sql server the same query does not return indexes-
select * from INFORMATION_SCHEMA.COLUMNS where table_name = 'tbl_ClientDN'
so i need query to compbine the result of -
sp_helpindex 'tbl_ClientDN'
how to get column_key showing indexes in mssql query.
any suggestion ?

Answer 1

Stay away from INFORMATION_SCHEMA.COLUMNS, especially for indexes, since things like filtered indexes and included columns are not part of the definition. I talk about this in more detail here:
The case against INFORMATION_SCHEMA views
You want to use sys.indexes and sys.index_columns for this. For example:
DECLARE #tablename NVARCHAR(512) = 'dbo.tbl_ClientDN';
SELECT
[Index] = i.name,
[Column] = c.Name,
[Type] = i.type_desc,
PK = i.is_primary_key,
[Unique] = i.is_unique,
[Unique Constraint] = i.is_unique_constraint,
[DESC] = ic.is_descending_key,
[INCLUDE] = ic.is_included_column,
[Filtered] = i.filter_definition -- only for SQL Server 2008+
FROM
sys.indexes AS i
INNER JOIN
sys.index_columns AS ic
ON i.[object_id] = ic.[object_id]
AND i.index_id = ic.index_id
INNER JOIN
sys.columns c
ON ic.column_id = c.column_id
AND ic.[object_id] = c.[object_id]
WHERE
i.[object_id] = OBJECT_ID(#tablename)
ORDER BY [Index], ic.index_column_id;
If you want to do this for all tables at once, then simple changes:
SELECT
[Table] = QUOTENAME(OBJECT_SCHEMA_NAME(i.[object_id]))
+ '.' + QUOTENAME(OBJECT_NAME(i.[object_id])),
[Index] = i.name,
[Column] = c.Name,
[Type] = i.type_desc,
PK = i.is_primary_key,
[Unique] = i.is_unique,
[Unique Constraint] = i.is_unique_constraint,
[DESC] = ic.is_descending_key,
[INCLUDE] = ic.is_included_column,
[Filtered] = i.filter_definition -- only for SQL Server 2008+
FROM
sys.indexes AS i
INNER JOIN
sys.index_columns AS ic
ON i.[object_id] = ic.[object_id]
AND i.index_id = ic.index_id
INNER JOIN
sys.columns c
ON ic.column_id = c.column_id
AND ic.[object_id] = c.[object_id]
ORDER BY [Table], [Index], ic.index_column_id;
More information available in the topics sys.indexes and sys.index_columns.
You also might want to take a look at Kimberley L. Tripp's sp_helpindex2.
EDIT
In general I agree with #BrianWhite's comment. If you are spending any effort on this at all, you should be using a tool for this instead of re-inventing the wheel and trying to write it yourself. Troubleshooting this one query you've probably already spent, in terms of time, the cost of a good tool. Please read this post:
The cost of reinventing the wheel

Answer 2

Perhaps you are after sp_help
http://msdn.microsoft.com/en-us/library/ms187335.aspx
Simply entering
sp_help myTableName
should give you all the data you could want.