I want to make views from all tables already exist in database that’s hard task to catch the tables one by one and make create view XXXX as select * from Table_name .I find something that it is possible with cursor and the code is :
DECLARE #TableName sysname
DECLARE #ColumnCount INT
DECLARE #ColumnID INT
DECLARE #SelectColumn NVARCHAR(500)
DECLARE #sql NVARCHAR(max) = ''
DECLARE QUERYINFO CURSOR FOR
SELECT
t.name AS TableName,
ccount.ColumnCount,
c.column_id AS ColumnID,
CASE WHEN c.column_id <> ccount.ColumnCount
THEN c.name + ', '
ELSE c.name
END AS SelectColumn
FROM sys.tables t
INNER JOIN sys.columns c ON t.object_id=c.object_id
INNER JOIN (
SELECT object_id,COUNT(*) AS ColumnCount
FROM sys.columns
GROUP BY object_id
) ccount ON t.object_id = ccount.object_id
ORDER BY t.Name,c.column_id
OPEN QUERYINFO
FETCH NEXT FROM QUERYINFO INTO #TableName,#ColumnCount,#ColumnID,#SelectColumn
WHILE ##FETCH_STATUS = 0
BEGIN
IF #ColumnID = 1
BEGIN
SET #sql = 'CREATE VIEW v_' + #TableName + ' AS SELECT ' + #SelectColumn
END
ELSE
BEGIN
SET #sql = #sql + #SelectColumn
END
IF #ColumnID = #ColumnCount
BEGIN
SET #sql = #sql + ' FROM ' + #TableName
EXEC sys.sp_executesql #sql
SET #sql = ''
END
FETCH NEXT FROM QUERYINFO INTO #TableName,#ColumnCount,#ColumnID,#SelectColumn
END
CLOSE QUERYINFO
DEALLOCATE QUERYINFO
but it has error and I don't know how solve it
This is what I would do with dynamic SQL; checking first to see if the view exists, then creating it with all of the columns (not by using SELECT * FROM...).
DECLARE #SQL nvarchar(MAX)
SET #SQL = N''
SELECT
#SQL = #SQL +
N'IF EXISTS(SELECT 1 FROM sys.objects WHERE name = N''v_' + t.name + N''' AND type = N''V'') BEGIN DROP VIEW [v_' + t.name + '] END CREATE VIEW [v_' + t.name + N'] AS SELECT ' +
STUFF(
(SELECT N',' + c.name
FROM
sys.columns AS c
WHERE
c.OBJECT_ID = t.OBJECT_ID
ORDER BY
column_id
FOR XML PATH(''), TYPE).value('.',N'nvarchar(max)')
,1,1,N'')
+ N' FROM [' + t.name + N'];'
FROM
sys.tables AS t
EXEC sp_executesql #SQL
Related
I'm trying to convert the following query to dynamic SQL to allow for variations:
UPDATE T
SET SumCount = J.SUM
FROM #temp T
JOIN (SELECT Count_99221 + COUNT_99222 + Count_99223 [SUM], t2.userID
FROM #temp t2
GROUP BY t2.userID, Count_99221 + COUNT_99222 + Count_99223
) J ON T.userID = J.UserID
This is what I have for the Dynamic SQL:
DECLARE #sql3 nvarchar(2000) =
'UPDATE T ' +
'SET SumCount = J.SumOfColumns ' +
'FROM #temp T ' +
'JOIN (SELECT ' + #columnSumString + ' [SumOfColumns], t2.userID ' +
'FROM #temp t2 ' +
'GROUP BY t2.userID, ' + #columnSumString +
' ) J ON T.userID = J.UserID'
EXEC sp_executesql #sql3
I am receiving the following error only when I run the query as Dynamic SQL:
Each GROUP BY expression must contain at least one column that is not
an outer reference.
Can somebody help explain why this is happening? I am new to Dynamic SQL so I'm not privy to any limitations for running queries this way.
Thank you in advance.
EDIT:
The variable #columnString is a string made by concatenating several other column names, created in the following way:
DECLARE #Cursor Cursor
DECLARE #code varchar(20)
DECLARE #ID INT
SET #cptCursor = CURSOR FOR
SELECT * FROM dbo.Split(#UserInput,CHAR(44))
OPEN #cptCursor
FETCH NEXT FROM #cptCursor INTO #ID, #code
WHILE ##FETCH_STATUS = 0
BEGIN
DECLARE #colName varchar(50) = 'Count_' + cast(#code as varchar(10))
DECLARE #sql nvarchar(50) = 'ALTER TABLE #temp ADD ' + #colName + ' int'
EXEC sp_executesql #sql
--Code that adds values to each column that is created.....
SET #columnSumString = #colName + ' + ' + #columnSumString
--SET #columnSumString = #code + ' + ' + #columnSumString
FETCH NEXT FROM #cptCursor INTO #ID, #code
END
CLOSE #Cursor
DEALLOCATE #Cursor
SET #columnSumString = SUBSTRING(#columnSumString,1,LEN(#columnSumString)-2)
SELECT #columnSumString
The user input is a comma separated string. "Count_99221 + COUNT_99222 + Count_99223" is just one example of columns created from the user input "99221, 99222, 99223".
I also realized I was concatenating the #code variable into #columnSumString instead of #colName. Now when I run the query I don't get the error (even though I don't understand how the above error message relates to that mistake) but every value of SumCount is NULL.
IMHO you must re-write your query as follow:
UPDATE #temp
SET SumCount =
(SELECT Count_99221 + COUNT_99222 + Count_99223
FROM #temp t2
WHERE t2.userID = #temp.userID)
So the dynamic SQL will become:
DECLARE #columnString varchar(200)
SET #columnString = Count_99221 + COUNT_99222 + Count_99223
DECLARE #sql3 nvarchar(2000) =
N'UPDATE #temp ' +
'SET SumCount = (SELECT ' + #columnString +
' FROM #temp t2 WHERE t2.userID = #temp.userID)'
EXEC sp_executesql #sql3
SELECT TOP 10
*
FROM
(SELECT
COLUMN_NAME, TABLE_NAME
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE
COLUMN_NAME LIKE '%MAIL%')
I am trying to get the top 10 rows from each of the tables within my search. Any ideas? SQL Server 2008 R2
While nscheaffer's answer is valid, I feel obligated to tell you that you can get the exact same functionality without using a cursor, and also while using a query which might be a bit easier to implement.
Just concatenate all of the possible queries together based off the system tables and then execute them simultaneously, like this:
DECLARE #SQL NVARCHAR(MAX)
;
SELECT #SQL =
(
SELECT 'SELECT TOP 10 * FROM ' + OBJECT_NAME(C.Object_ID) + ';' + CHAR(10)
FROM sys.Columns C
INNER JOIN sys.Tables T
ON C.Object_ID = T.Object_ID
AND T.is_ms_shipped = 0
WHERE C.Name LIKE '%Mail%'
GROUP BY C.Object_ID
ORDER BY C.Object_ID
FOR XML PATH('')
)
;
EXEC sp_ExecuteSQL #SQL
;
If you want to check the SQL before it runs, just comment out the EXEC command and replace it with a SELECT, like this:
SELECT #SQL;
--EXEC sp_ExecuteSQL #SQL
;
I would use a cursor to create dynamic SQL and then execute that SQL. Does this work for you?
DECLARE #SQL NVARCHAR (4000) = ''
DECLARE #Table_Name NVARCHAR(50)
DECLARE TableCursor CURSOR FAST_FORWARD READ_ONLY FOR
SELECT DISTINCT TABLE_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE COLUMN_NAME LIKE '%MAIL%'
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO #Table_Name
WHILE ##FETCH_STATUS = 0
BEGIN
SET #SQL = #SQL + '
SELECT TOP 10 * FROM ' + #Table_Name + '
GO
'
FETCH NEXT FROM TableCursor INTO #Table_Name
END
CLOSE TableCursor
DEALLOCATE TableCursor
EXECUTE sp_executeSQL #SQL
Here is the script I am using to run against all the databases on sql server but somehow the script stops when the database is in transition so all I want to do is the script needs to skip the database that is in transition and proceed with rest of the databases. Any help would be appreciated.
declare #name varchar(max)
SET #starttime = GETDATE()
Declare DB_cursor cursor for
SELECT Name
FROM sys.databases
WHERE name NOT IN ('master', 'model', 'msdb', 'tempdb')
AND is_read_only = 0
AND is_in_standby = 0
AND state = 0
OPEN DB_cursor
FETCH NEXT FROM DB_cursor INTO #name
WHILE ##FETCH_STATUS = 0
BEGIN
EXEC(' use [' + #name + '] IF EXISTS (select name from sys.objects where name=''#Tablename'') UPDATE STATISTICS [' + #SchemaName + '].[' + #TableName +'](['+#StatsName+']) WITH FULLSCAN ')
FETCH NEXT FROM DB_cursor INTO #name
END
CLOSE DB_cursor
DEALLOCATE DB_cursor
Try:
DECLARE #sql NVARCHAR(MAX)
SET #sql = ' use [' + #name + '] IF EXISTS (select name from sys.objects where name=''#Tablename'') UPDATE STATISTICS [' + #SchemaName + '].[' + #TableName +'](['+#StatsName+']) WITH FULLSCAN ' )
EXEC sp_executesql #sql = #sql
I have an table include 1 column ID and 12 columns month (Month01 to Month12). If i have an parameter #month=9, how can i compare to get column Month01 to Month09 without Month10, Month11, Month12. Please help me!
Simo's answer is more elegant, but below is an alternative "basic" way to do this:
DECLARE #month INT
SET #month = 9
IF #Month = 1
BEGIN
SELECT Id, Month01
FROM MonthlyData
END
IF #Month = 2
BEGIN
SELECT Id, Month01, Month02
FROM MonthlyData
END
-- Repeat for months 3-9
IF #Month = 9
BEGIN
SELECT Id, Month01, Month02, Month03, Month04,
Month05, Month06, Month07, Month08, Month09
FROM MonthlyData
END
-- Repeat for months 10-12
See my SQL Fiddle.
declare #str varchar(1000)
SELECT #str= coalesce(#str + ', ', '') + a.name
FROM (
Select name from sys.columns
where object_id = OBJECT_ID('table_months')
and isnumeric(right(name,2))= 1 and name like 'month%'
and cast(right(name,2) as int) < '03') a
-- Instead of '03' you use a variable and assign required moths number
declare #sql nvarchar(100)
set #sql = 'select ID, '+ #str+' from table_months'
exec sp_executesql #sql
you may try this out also :)
DECLARE #month int = 9
DECLARE #Sql nvarchar(100) =''
DECLARE #pos int = 1
WHILE(#pos <= #month)
BEGIN
SET #Sql = #Sql + (',month' + right('00'+ rtrim(#pos), 2))
SET #pos = #pos + 1
END
SET #Sql= 'SELECT ID ' +#Sql + ' FROM table'
EXEC sp_executesql #Sql
DECLARE #month int
DECLARE #tableName nvarchar(128)
SET #month = 9;
SET #tableName = 'months' -- YOUR TABLE's NAME
DECLARE #query nvarchar(2048)
SET #query =
'SELECT id, ' + STUFF((SELECT DISTINCT ', ' + name
FROM sys.columns WHERE name LIKE'Month%'
AND object_id = OBJECT_ID(#tableName)
AND CONVERT(INT, RIGHT(name, 2)) <= #month
FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'),1,1,'')
+ ' FROM ' + #tableName;
EXEC(#query)
I'm trying to alter multiple SQL Server 2008 R2 tables at one time.
This is my code:
use DatabaseName
go
Declare #SchemaUsed varchar(20) = 'dbo'
create table #Tables
(
TableName varchar(100), Processed int
)
insert into #Tables
select top 1 table_name, 0
from INFORMATION_SCHEMA.TABLES
where TABLE_SCHEMA = #SchemaUsed
and table_type = 'Base Table'
and (TABLE_NAME like 'PM%' )
ORDER BY TABLE_NAME
DECLARE #TableName varchar(max)
DECLARE #SQL varchar(max)
WHILE EXISTS (select top 1 'x' from #Tables where Processed = 0)
BEGIN
SET #TableName = (select top 1 TableName from #Tables where Processed = 0)
Set #SQL = 'ALTER TABLE ' + #SchemaUsed + '.' + #TableName + ' ADD [identityID] bigint IDENTITY(1, 1) NOT NULL '
-- Set #SQL = '''' + #SQL + ''''
Print #SQL
EXEC #SQL;
update #Tables
set Processed = 1
where TableName = #TableName
END
drop table #Tables
I can't get this to work to save my life and get the following error:
Lookup Error - SQL Server Database Error: The name 'ALTER TABLE
dbo.PM1GTVLV ADD [identityID] bigint IDENTITY(1, 1) NOT NULL ' is not
a valid identifier.
I've also tried multiple string variations and using sp_executesql as well.
Can someone point out where I've gone wrong?
Try
DECLARE #SQL NVARCHAR(MAX);
EXEC sp_executesql #SQL;
Instead of EXEC #sql.
As an aside, this is a much more usable version of the same code IMHO:
DECLARE #SchemaUsed VARCHAR(20) = 'dbo';
DECLARE #sql NVARCHAR(MAX) = N'';
SELECT #sql += CHAR(13) + CHAR(10) + N'ALTER TABLE '
+ QUOTENAME(#SchemaUsed) + '.'
+ QUOTENAME(name) + ' ADD [identityID]
BIGINT IDENTITY(1,1) NOT NULL;'
FROM sys.tables
WHERE SCHEMA_NAME([schema_id]) = #SchemaUsed
AND name LIKE 'PM%';
PRINT #sql;
--EXEC sp_executesql #sql;
Or even better:
DECLARE #SchemaUsed VARCHAR(20) = 'dbo';
DECLARE #sql NVARCHAR(MAX) = N'';
SELECT #sql += CHAR(13) + CHAR(10) + N'ALTER TABLE '
+ QUOTENAME(#SchemaUsed) + '.'
+ QUOTENAME(name) + ' ADD [identityID]
BIGINT IDENTITY(1,1) NOT NULL;'
FROM sys.tables AS t
WHERE SCHEMA_NAME([schema_id]) = #SchemaUsed
AND name LIKE 'PM%'
AND NOT EXISTS (SELECT 1 FROM sys.columns AS c
WHERE [object_id] = t.[object_id]
AND c.is_identity = 1);
PRINT #sql;
--EXEC sp_executesql #sql;
To execute a character string, EXEC requires parenthesis around the string (or character variable) as shown in the BOL syntax:
EXEC (#SQL);