I want to create View from the system tables - tsql

Question

I wanted to create a view from the system tables, I could output the syntax which I want to run but how could I run that output command?
I created the following query which output the syntax to create the table
SELECT
'CREATE VIEW [Uti_John].[Vw_' + x.table_name +']' +
' AS SELECT * FROM [' + x.schema_name + '].[' + x.table_name +']'
FROM
(
SELECT SCHEMA_NAME(schema_id) AS schema_name
,name AS table_name
FROM sys.tables
WHERE name like 'T%'
and SCHEMA_NAME(schema_id) = 'dbo'
) x
Output
CREATE VIEW [Uti_John].[Vw_TNAME] AS SELECT * FROM [dbo].[TNAME]
CREATE VIEW [Uti_John].[Vw_TClient] AS SELECT * FROM [dbo].[TClient]
CREATE VIEW [Uti_John].[Vw_TClaim] AS SELECT * FROM [dbo].[TTClaim]
CREATE VIEW [Uti_John].[Vw_TInsurance] AS SELECT * FROM [dbo].[TTInsurance]
CREATE VIEW [Uti_John].[Vw_Ttest] AS SELECT * FROM [dbo].[Ttest]
copying manually one by one output of this creates the view but how could I run this output in a loop and create automatically?

Answer 1

You can use the sys.views view to check if the view already exists.
DECLARE #SQL NVARCHAR(max)='*';
WHILE #SQL IS NOT NULL
BEGIN
SET #SQL = NULL;
SELECT #SQL =
'CREATE VIEW [Uti_John].[Vw_' + x.table_name +']' +
' AS SELECT * FROM [' + x.schema_name + '].[' + x.table_name +']'
FROM
(
SELECT SCHEMA_NAME(schema_id) AS schema_name
,t.name AS table_name
FROM sys.tables t
WHERE t.name like 't%'
and SCHEMA_NAME(t.schema_id) = 'dbo'
AND NOT EXISTS ( SELECT *
FROM sys.views v
WHERE v.name = 'Vw_' + t.name
AND OBJECT_SCHEMA_NAME(v.object_id) = 'Uti_John'
)
) x
EXEC sp_executesql #SQL;
PRINT #SQL;
END ;