I try this but didn't work
ALTER Procedure [dbo].[SP_TruncateDTS] as
begin
declare #Table Varchar(200)
declare cur1 cursor for
SELECT TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME like '%DTS%' and TABLE_TYPE = 'BASE TABLE'
open cur1
fetch next from cur1 into #Table
while ##FETCH_STATUS <> -1
begin
TRUNCATE TABLE #Table
fetch next from cur1 into #Table
end
close cur1
deallocate cur1
end
You cannot pass identifiers (such as table names, column names, and so forth) as parameters in queries. Instead, you need to use dynamic SQL.
So replace the inner loop with:
declare #sql nvarchar(max);
set #sql = 'TRUNCATE TABLE [Table]';
set #sql = replace(#sql, '[Table]', #table);
exec sp_executesql #sql;
The example below uses the sys.tables catalog view and aggregate string concatenation instead of a cursor for the task.
DECLARE #SQL nvarchar(MAX) = (
SELECT N'TRUNCATE TABLE ' + QUOTENAME(OBJECT_SCHEMA_NAME(object_id)) + N'.' + QUOTENAME(name) +N';'
FROM sys.tables
WHERE name like N'%DTS%'
FOR XML PATH(''), TYPE).value('.', 'nvarchar(MAX)');
EXECUTE sp_executesql #SQL;
In SQL Serveer 2017 and later, you can use STRING_AGG:
DECLARE #SQL nvarchar(MAX) = (
SELECT STRING_AGG ('TRUNCATE TABLE ' + QUOTENAME(OBJECT_SCHEMA_NAME(object_id)) + N'.' + QUOTENAME(name),';')
FROM sys.tables
WHERE name like N'%DTS%'
);
EXECUTE sp_executesql #SQL;
Note that this schema-qualifies names and uses QUOTENAME to handle cases where the name doesn't conform to regular identifier naming rules.
Related
I need to get the max edit date for each table in our database and store in a temp table. The cursor works fine but when I run exec sp_executesql #sql I get a parameter expectation error:
Parameterized dynamic query within Cursor gives ERROR Procedure expects parameter '#params' of type 'ntext/nchar/nvarchar'
What am I doing wrong?
SET NOCOUNT ON
IF OBJECT_ID('tempdb..##GetMaxVistaEditDate') IS NOT NULL
DROP TABLE ##GetMaxVistaEditDate
CREATE TABLE ##GetMaxVistaEditDate
(
MySchema nvarchar(max),
MyTable nvarchar(max),
MaxVistaEditDate DateTime
)
-- SELECT * FROM ##GetMaxVistaEditDate
DECLARE MyCursor CURSOR FOR
SELECT
SCHEMA_NAME(t.schema_id) Schemaname,
t.name AS TableName
FROM
sys.tables t
WHERE
Schema_Name(t.Schema_id) like 'R_PERS%'
OPEN MyCursor
DECLARE #Schema VARCHAR(100), #Table VARCHAR(100), #MaxVistaEditDate DATETIME
DECLARE #sql NVARCHAR(MAX) = '', #params NVARCHAR(MAX);
SET #params = N'#MaxVistaEditDate DateTime OUTPUT';
FETCH FROM MyCursor INTO #Schema, #Table
WHILE ##FETCH_STATUS = 0
BEGIN
SET #SQL = 'DECLARE #MaxVistaEditDate DATETIME SELECT #MaxVistaEditDate = (SELECT MAX(VistaEditDate) FROM ' + #SCHEMA + '.' + #TABLE + ')'
EXEC sp_executesql #sql, #MaxVistaEditDate OUTPUT
-- PRINT #SQL
-- PRINT #MaxVistaEditDate
INSERT INTO ##GetMaxVistaEditDate
SELECT #Schema, #Table, #MaxVistaEditDate
FETCH FROM MyCursor INTO #Schema, #Table
END
CLOSE MyCursor
DEALLOCATE MyCursor
You don't have to declare the variables on the sql string, you have to do it on a different variable, and you already have one for that (you name it #params).
Change your #sql definition for the following
SET #SQL = 'Select #MaxVistaEditDate = (SELECT MAX(VistaEditDate) From ' + #SCHEMA + '.' + #TABLE + ')'
And change your call for this:
exec sp_executesql #sql ,#params, #MaxVistaEditDate = #MaxVistaEditDate OUTPUT
and it should work.
Note: Don't forget to close and deallocate the cursor.
you can find an answer in this post
SP_EXECUTESQL and Output Parameter
and your sp_executesql statement don't have parameter definition and you don't have to declare a variable inside the dynamic query
declare #MaxVistaEditDate datetime
exec sp_executesql #sql ,N'#MaxVistaEditDateOut datetime OutPut, #MaxVistaEditDateOut=#MaxVistaEditDate OUTPUT
I am newbie here. I have many databases in my SSMS, so I need to find the database name using the given table name using stored procedures.
And I am not good at writing SP's and handling errors.
I apologize for my English.
Thank you
I tried it using cursors in stored procedure.
But I am getting errors as I am not good at handling errors.
You could create the stored procedure in the following:
CREATE PROCEDURE sp_Get_Tables
#schema VARCHAR(50) = 'dbo',
#table_name VARCHAR(100) = 'Default_Table_Name'
AS
SELECT name
FROM sys.databases
WHERE CASE WHEN state_desc = 'ONLINE' THEN OBJECT_ID(QUOTENAME(name) + '.' + #schema + '.' + #table_name, 'U') END IS NOT NULL
And execute the stored procedure you can in the following:
EXEC sp_Get_Names 'Schema', 'Table_Name'
Try This:
Create PROCEDURE Pro_FindTable
(#tableName VARCHAR(MAX))
AS
BEGIN
SET NOCOUNT ON;
DECLARE #name VARCHAR(MAX),
#dbid INT;
DECLARE C CURSOR FAST_FORWARD FOR(
SELECT name,
database_id
FROM sys.databases);
OPEN C;
FETCH NEXT FROM C
INTO #name,
#dbid;
WHILE ##FETCH_STATUS = 0
BEGIN
DECLARE #query NVARCHAR(MAX)
= 'IF EXISTS(SELECT name FROM(SELECT name, COUNT(*)Over(Order By (Select Null)) as RN FROM(SELECT '''
+ #name + ''' AS name UNION ALL SELECT name FROM [' + #name
+ '].sys.tables WHERE type=''U'' AND name = ''' + #tableName
+ ''') as K)as K Where RN>1)
Select '''+ #name + '''';
EXEC (#query);
FETCH NEXT FROM C
INTO #name,
#dbid;
END;
CLOSE C;
DEALLOCATE C;
END;
And call it like this:
EXEC Pro_FindTable 'MyTable'
Result will be all databases which has a table named 'MyTable'
I am trying to execute this query:
declare #tablename varchar(50)
set #tablename = 'test'
select * from #tablename
This produces the following error:
Msg 1087, Level 16, State 1, Line 5
Must declare the table variable "#tablename".
What's the right way to have the table name populated dynamically?
For static queries, like the one in your question, table names and column names need to be static.
For dynamic queries, you should generate the full SQL dynamically, and use sp_executesql to execute it.
Here is an example of a script used to compare data between the same tables of different databases:
Static query:
SELECT * FROM [DB_ONE].[dbo].[ACTY]
EXCEPT
SELECT * FROM [DB_TWO].[dbo].[ACTY]
Since I want to easily change the name of table and schema, I have created this dynamic query:
declare #schema sysname;
declare #table sysname;
declare #query nvarchar(max);
set #schema = 'dbo'
set #table = 'ACTY'
set #query = '
SELECT * FROM [DB_ONE].' + QUOTENAME(#schema) + '.' + QUOTENAME(#table) + '
EXCEPT
SELECT * FROM [DB_TWO].' + QUOTENAME(#schema) + '.' + QUOTENAME(#table);
EXEC sp_executesql #query
Since dynamic queries have many details that need to be considered and they are hard to maintain, I recommend that you read: The curse and blessings of dynamic SQL
Change your last statement to this:
EXEC('SELECT * FROM ' + #tablename)
This is how I do mine in a stored procedure. The first block will declare the variable, and set the table name based on the current year and month name, in this case TEST_2012OCTOBER. I then check if it exists in the database already, and remove if it does. Then the next block will use a SELECT INTO statement to create the table and populate it with records from another table with parameters.
--DECLARE TABLE NAME VARIABLE DYNAMICALLY
DECLARE #table_name varchar(max)
SET #table_name =
(SELECT 'TEST_'
+ DATENAME(YEAR,GETDATE())
+ UPPER(DATENAME(MONTH,GETDATE())) )
--DROP THE TABLE IF IT ALREADY EXISTS
IF EXISTS(SELECT name
FROM sysobjects
WHERE name = #table_name AND xtype = 'U')
BEGIN
EXEC('drop table ' + #table_name)
END
--CREATES TABLE FROM DYNAMIC VARIABLE AND INSERTS ROWS FROM ANOTHER TABLE
EXEC('SELECT * INTO ' + #table_name + ' FROM dbo.MASTER WHERE STATUS_CD = ''A''')
Use:
CREATE PROCEDURE [dbo].[GetByName]
#TableName NVARCHAR(100)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE #sSQL nvarchar(500);
SELECT #sSQL = N'SELECT * FROM' + QUOTENAME(#TableName);
EXEC sp_executesql #sSQL
END
You can't use a table name for a variable. You'd have to do this instead:
DECLARE #sqlCommand varchar(1000)
SET #sqlCommand = 'SELECT * from yourtable'
EXEC (#sqlCommand)
You'll need to generate the SQL content dynamically:
declare #tablename varchar(50)
set #tablename = 'test'
declare #sql varchar(500)
set #sql = 'select * from ' + #tablename
exec (#sql)
Use sp_executesql to execute any SQL, e.g.
DECLARE #tbl sysname,
#sql nvarchar(4000),
#params nvarchar(4000),
#count int
DECLARE tblcur CURSOR STATIC LOCAL FOR
SELECT object_name(id) FROM syscolumns WHERE name = 'LastUpdated'
ORDER BY 1
OPEN tblcur
WHILE 1 = 1
BEGIN
FETCH tblcur INTO #tbl
IF ##fetch_status <> 0
BREAK
SELECT #sql =
N' SELECT #cnt = COUNT(*) FROM dbo.' + quotename(#tbl) +
N' WHERE LastUpdated BETWEEN #fromdate AND ' +
N' coalesce(#todate, ''99991231'')'
SELECT #params = N'#fromdate datetime, ' +
N'#todate datetime = NULL, ' +
N'#cnt int OUTPUT'
EXEC sp_executesql #sql, #params, '20060101', #cnt = #count OUTPUT
PRINT #tbl + ': ' + convert(varchar(10), #count) + ' modified rows.'
END
DEALLOCATE tblcur
You need to use the SQL Server dynamic SQL:
DECLARE #table NVARCHAR(128),
#sql NVARCHAR(MAX);
SET #table = N'tableName';
SET #sql = N'SELECT * FROM ' + #table;
Use EXEC to execute any SQL:
EXEC (#sql)
Use EXEC sp_executesql to execute any SQL:
EXEC sp_executesql #sql;
Use EXECUTE sp_executesql to execute any SQL:
EXECUTE sp_executesql #sql
Declare #tablename varchar(50)
set #tablename = 'Your table Name'
EXEC('select * from ' + #tablename)
Also, you can use this...
DECLARE #SeqID varchar(150);
DECLARE #TableName varchar(150);
SET #TableName = (Select TableName from Table);
SET #SeqID = 'SELECT NEXT VALUE FOR ' + #TableName + '_Data'
exec (#SeqID)
Declare #fs_e int, #C_Tables CURSOR, #Table varchar(50)
SET #C_Tables = CURSOR FOR
select name from sysobjects where OBJECTPROPERTY(id, N'IsUserTable') = 1 AND name like 'TR_%'
OPEN #C_Tables
FETCH #C_Tables INTO #Table
SELECT #fs_e = sdec.fetch_Status FROM sys.dm_exec_cursors(0) as sdec where sdec.name = '#C_Tables'
WHILE ( #fs_e <> -1)
BEGIN
exec('Select * from ' + #Table)
FETCH #C_Tables INTO #Table
SELECT #fs_e = sdec.fetch_Status FROM sys.dm_exec_cursors(0) as sdec where sdec.name = '#C_Tables'
END
We suffered some kind of invasion in our SQL Server.
I'm trying to find in every database, in every table, every column the word abortion and cheat.
I can do this with this query, but in a single database.
-- Store results in a local temp table so that. I'm using a
-- local temp table so that I can access it in SP_EXECUTESQL.
create table #tmp
(
db varchar(max),
tbl nvarchar(max),
col nvarchar(max),
val nvarchar(max),
);
declare #db nvarchar(max);
declare #tbl nvarchar(max);
declare #col nvarchar(max);
declare #q nvarchar(max);
declare #search nvarchar(max) = 'abortion';
-- Create a cursor on all columns in the database
declare c cursor for
SELECT
DB_NAME(DB_ID()) as DBName, tbls.TABLE_NAME, cols.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLES AS tbls
JOIN INFORMATION_SCHEMA.COLUMNS AS cols ON tbls.TABLE_NAME = cols.TABLE_NAME
-- For each table and column pair, see if the search value exists.
open c
fetch next from c into #db, #tbl, #col
while ##FETCH_STATUS = 0
begin
-- Look for the search key in current table column and if found add it to the results.
SET #q = 'INSERT INTO #tmp SELECT ''' +#db+''',''' + #tbl + ''', ''' + #col + ''', ' + #col + ' FROM ' + #tbl + ' WHERE ' + #col + ' LIKE ''%' + #search + '%'''
EXEC SP_EXECUTESQL #q
fetch next from c into #db, #tbl, #col
end
close c
deallocate c
-- Get results
select distinct db,tbl,col from #tmp
-- Remove local temp table.
drop table #tmp
How can I find these strings? The result set should be:
DATABASE | TABLE | COLUMN
I don't need the result ( text field ), and I need to select distinct for tables and columns, because it will be a lot of abortion in the same table/column.
While the use of the undocumented sp_msforeachdb is generally not encouraged, my instinct would be to send your existing code to this procedure like this:
exec sp_MSforeachdb 'USE [?];
-- Store results in a local temp table so that. I'm using a
-- local temp table so that I can access it in SP_EXECUTESQL.
create table #tmp (
db varchar(max) ,
tbl nvarchar(max),
col nvarchar(max),
val nvarchar(max),
);
declare #db nvarchar(max);
declare #tbl nvarchar(max);
declare #col nvarchar(max);
declare #q nvarchar(max);
--------------------------------------------------------------------------------------------
declare #search nvarchar(max) = ''abortion'';
--------------------------------------------------------------------------------------------
-- Create a cursor on all columns in the database
declare c cursor for
SELECT DB_NAME(DB_ID()) as DBName,tbls.TABLE_NAME, cols.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLES AS tbls
JOIN INFORMATION_SCHEMA.COLUMNS AS cols
ON tbls.TABLE_NAME = cols.TABLE_NAME
-- For each table and column pair, see if the search value exists.
open c
fetch next from c into #db, #tbl, #col
while ##FETCH_STATUS = 0
begin
-- Look for the search key in current table column and if found add it to the results.
SET #q = ''INSERT INTO #tmp SELECT '''''' +#db+'''''','''''' + #tbl + '''''', '''''' + #col + '''''', '' + #col + '' FROM '' + #tbl + '' WHERE '' + #col + '' LIKE ''''%'' + #search + ''%''''''
EXEC SP_EXECUTESQL #q
fetch next from c into #db, #tbl, #col
end
close c
deallocate c;'
The only added code here is the first line, for the rest of the code just make sure to replace ' with ''. The ? in USE [?] is a special character meaning the currently active database in the loop sp_MSforeachdb executes.
I am using SQL Server 2008 R2 on dev, and SQL Azure for test and live.
I wish to write a little procedure to reset the identity seeds since SQL Azure does not support DBCC.
I have some workaround code which works, but I do not want to write it out for each table, so was trying to write a routine that iterates through the DB tables.
Tables:
SELECT * FROM information_schema.tables
Code:
delete from TABLE_NAME where Id>150000
GO
SET IDENTITY_INSERT [TABLE_NAME] ON
GO
INSERT INTO [TABLE_NAME](Id) VALUES(150000)
GO
delete from TABLE_NAME where Id=150000
GO
SET IDENTITY_INSERT [TABLE_NAME] OFF
GO
I guess I need to wrap this in a loop. Sorry my T-SQL is not that strong, hence the request for help.
Also it would be helpful to omit all tables with TABLE_NAME starting with aspnet_ and use only TABLE_TYPE = "BASE TABLE"
Any help hugely appreciated.
Unless somebody else knows a trick that I don't, you're probably stuck using dynamic SQL and iterating through a list of table names using either a cursor or a temporary table. The cursor approach would look something like this:
declare #TableName nvarchar(257);
declare #sql nvarchar(max);
declare TableCursor cursor read_only for
select
TABLE_SCHEMA + '.' + TABLE_NAME
from
INFORMATION_SCHEMA.TABLES
where
TABLE_NAME not like 'aspnet\_%' escape '\' and
TABLE_TYPE = 'BASE TABLE';
open TableCursor;
fetch next from TableCursor into #TableName;
while ##fetch_status = 0
begin
set #sql = 'select top 1 * from ' + #TableName;
exec sp_executesql #sql;
fetch next from TableCursor into #TableName;
end
close TableCursor;
deallocate TableCursor;
You can read more about cursors here. Alternatively, you could do it with an in-memory table like this:
declare #Tables table (RowId int identity(1, 1), TableName nvarchar(257));
declare #TableName nvarchar(257);
declare #Index int;
declare #TableCount int;
declare #sql nvarchar(max);
insert into #Tables (TableName)
select
TABLE_SCHEMA + '.' + TABLE_NAME
from
INFORMATION_SCHEMA.TABLES
where
TABLE_NAME not like 'aspnet\_%' escape '\' and
TABLE_TYPE = 'BASE TABLE';
set #TableCount = ##rowcount;
set #Index = 1
while #Index <= #TableCount
begin
select #TableName = TableName from #Tables where RowId = #Index;
set #sql = 'select top 1 * from ' + #TableName;
exec sp_executesql #sql;
set #Index = #Index + 1;
end
In the interest of brevity, my examples use a much simpler SQL statement than yours—I'm just selecting one record from each table—but this ought to be enough to illustrate how you can get this done.