I need to create a query that is executed on all databases of my SQL server instance. An additional constraint is, that the query should only be executed on databases that contain a special table with a special column. Background is that in some databases the special table does (not) have the special column.
Based on this solution, what I have until now is a query that executes only on databases that contain a certain table.
SELECT *
FROM sys.databases
WHERE DATABASEPROPERTY(name, 'IsSingleUser') = 0
AND HAS_DBACCESS(name) = 1
AND state_desc = 'ONLINE'
AND CASE WHEN state_desc = 'ONLINE'
THEN OBJECT_ID(QUOTENAME(name) + '.[dbo].[CERTAIN_TABLE]', 'U')
END IS NOT NULL
However, what is still missing is a constraint that the query should only select databases where the table CERTAIN_TABLE has a specific column. How can this be achieved?
When i want to loop through all databases, i do a loop like the following. Its easy to follow:
DECLARE #dbs TABLE ( dbName NVARCHAR(100) )
DECLARE #results TABLE ( resultName NVARCHAR(100) )
INSERT INTO #dbs
SELECT name FROM sys.databases
DECLARE #current NVARCHAR(100)
WHILE (SELECT COUNT(*) FROM #dbs) > 0
BEGIN
SET #current = (SELECT TOP 1 dbName FROM #dbs)
INSERT INTO #results
EXEC
(
'IF EXISTS(SELECT 1 FROM "' + #current + '".INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = ''Target_Table_Name'' AND COLUMN_NAME = ''Target_Column_Name'')
BEGIN
--table and column exists, execute query here
SELECT ''' + #current + '''
END'
)
DELETE FROM #dbs
WHERE dbName = #current
END
SELECT * FROM #results
You are going to need either some looping or dynamic sql for this. I really dislike loops so here is how you could do this with dynamic sql.
declare #TableName sysname = 'CERTAIN_TABLE'
, #ColumnName sysname = 'CERTAIN_COLUMN'
declare #SQL nvarchar(max) = ''
select #SQL = #SQL + 'select DatabaseName = ''' + db.name + ''' from ' + QUOTENAME(db.name) + '.sys.tables t join ' + QUOTENAME(db.name) + '.sys.columns c on c.object_id = t.object_id where t.name = ''' + QUOTENAME(#TableName) + ''' and c.name = ''' + QUOTENAME(#ColumnName) + '''' + char(10) + 'UNION ALL '
from sys.databases db
where db.state_desc = 'ONLINE'
order by db.name
select #SQL = substring(#SQL, 0, len(#SQL) - 9)
select #SQL
--uncomment the line below when you are comfortable the query generated is correct
--exec sp_executesql #SQL
Related
I need to analyze a large table with hundreds of columns. A lot of columns are unused.
To investigate I could do something like
SELECT DISTINCT Column1
FROM myTable
or
WITH C AS
(
SELECT DISTINCT Column1
FROM MyTable
)
SELECT COUNT(*)
FROM C
Then I do the same for column2 and so on. However these queries only work for one column which is time consuming and does not give overview in one glance.
Any idea how to build such investigation query for all columns in one?
You need only 1 query where you have to list all the columns of the table:
SELECT COUNT(DISTINCT Column1) column1_count,
COUNT(DISTINCT Column2) column2_count,
COUNT(DISTINCT Column3) column3_count
.....................................
FROM MyTable;
For local purposes only, you can make it dynamic like this:
Get the columns of the table
the query is created as the colleagues did and then it is executed with the EXEC()
DECLARE #columns as Table(RowId INT IDENTITY(1,1), ColumnName nVarchar(50))
DECLARE #ii int = 0
DECLARE #max int = 0
DECLARE #sqlQuery nVarchar(MAX)
INSERT INTO #columns
SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = N'Customer'
SET #sqlQuery = 'SELECT '
SELECT #max = COUNT(*) FROM #columns
WHILE #ii <= #max
BEGIN
SELECT #sqlQuery = CONCAT(#sqlQuery,'COUNT(DISTINCT ',ColumnName,') ',LOWER(ColumnName),'_count, ')
FROM #columns
WHERE RowId = #ii
SET #ii = #ii + 1
END
SELECT #sqlQuery = CONCAT(#sqlQuery,'FROM Customer')
SELECT #sqlQuery = REPLACE(#sqlQuery,', FROM',' FROM')
select #sqlQuery
EXEC (#sqlQuery)
You should flesh out your requirement a bit more. If all you want to know is if a column contains only NULLs, you'll want to check for max(ColumnName) is null
declare #sql table (id int identity(1,1), QueryString nvarchar(max))
create table ##emptyColumns (emptyColumn nvarchar(128))
declare #i int = 0
declare #iMax int
declare #runthis nvarchar(max)
insert #sql
select 'select ''' + QUOTENAME(s.name) + '.' + QUOTENAME(o.name) + quotename(c.name) + ''' as ''column''
from ' + QUOTENAME(s.name) + '.' + QUOTENAME(o.name) + '
having max(' + c.name + ') is null'
from sys.sysobjects o
inner join sys.syscolumns c on c.id = o.id
inner join sys.schemas s on s.schema_id = o.uid
where o.type = 'U'
order by s.name
, o.name
, c.colorder
select #iMax = count(*)
from #sql
print #iMax
while #i < #iMax
begin
set #i = #i + 1
select #runthis = 'insert into ##emptyColumns
' + QueryString
from #sql
where id = #i
execute sp_executesql #runthis
end
select *
from ##emptyColumns
drop table ##emptyColumns
One further option you might consider:
declare #sql nvarchar(max)
select #sql = isnull(#sql + ' union all ', '') + 'select ''' + COLUMN_NAME + ''',
sum(case when ' + COLUMN_NAME + ' is null then 1 else 0 end) as null_values,
count(distinct ' + COLUMN_NAME + ') as count_distinct
from ' + TABLE_SCHEMA + '.' + TABLE_NAME + '
'
from information_schema.columns
where TABLE_SCHEMA = 'MySchema' and TABLE_NAME = 'MyTable'
exec (#sql)
If you had very big tables with large numbers of columns and were only interested in empty columns you could look into something like checksum_agg(checksum(column_name)). It may help improve performance.
You'd need to be wary of column data types, as they are not all compatible with distinct.
I have a SQL database with 60+ tables, almost all of which are populated with a CLIENTID field. I want to count the number of unique client IDs in each table.
The results I'm looking for are:
TABLE_NAME; CLIENTID_COUNT
dbo.HISTORY; 650
dbo.VISITS; 596
dbo.SALES; 1053
...; ...
This seems like it should be so simple but I've been playing around with cursors for hours and can't figure this one out. Please help!
IF OBJECT_ID('tempdb..#temp_RESULTS') IS NOT NULL DROP TABLE #temp_RESULTS
CREATE TABLE #TEMP_RESULTS
(
TABLENAME VARCHAR(MAX),
CLIENTCNT BIGINT
)
DECLARE #TABLENAME VARCHAR(MAX)
DECLARE #command VARCHAR(MAX)
IF OBJECT_ID('tempdb..#temp_PROCESS') IS NOT NULL DROP TABLE #temp_PROCESS
SELECT * INTO #TEMP_PROCESS FROM sys.tables
WHILE EXISTS(SELECT * FROM [#TEMP_PROCESS])
BEGIN
SET #TABLENAME = (SELECT TOP 1 [NAME] FROM [#TEMP_PROCESS])
SET #command = ('SELECT ''' + #TABLENAME + ''', COUNT(DISTINCT CLIENTID) AS CLIENTCNT FROM ' + #TABLENAME)
SELECT #command
INSERT INTO #TEMP_RESULTS
EXEC(#command)
DELETE FROM [#TEMP_PROCESS] WHERE [NAME] = #TABLENAME
END
SELECT * FROM [#TEMP_RESULTS]
Assuming the column is exactly ClientId in every table, you should be able to use this as is:
DROP TABLE IF EXISTS #clientId
CREATE TABLE #clientId
(
TableName nvarchar(1000),
ClientIdCount bigint
)
DECLARE #TableName nvarchar(1000);
DECLARE #CurrentQuery nvarchar(2000);
DECLARE result_cursor CURSOR local fast_forward FOR
SELECT DISTINCT
'['+TABLE_SCHEMA + '].[' + TABLE_NAME + ']'
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE
COLUMN_NAME = 'ClientId'
OPEN result_cursor
FETCH NEXT FROM result_cursor into #TableName
WHILE ##FETCH_STATUS = 0
BEGIN
SET #CurrentQuery = 'SELECT ''' + #TableName + ''', COUNT(DISTINCT ClientId) FROM ' + #TableName
--print #CurrentQuery
INSERT INTO
#clientId
(
TableName,
ClientIdCount
)
EXEC(#CurrentQuery)
FETCH NEXT FROM result_cursor into #TableName
END
--end loop
--clean up
CLOSE result_cursor
DEALLOCATE result_cursor
GO
SELECT
*
FROM
#clientId
You could use dynamic sql.
This will read through your system tables, find those that have a ClientID column, and build the text of a query that's in the general shape of 'Select Count(DISTINCT ClientID)' from each table.
DECLARE #SQLQuery as nvarchar(max) = ''
------------------------------------
-- GET THE TABLES THAT HAVE A CLIENTID FROM SCHEMA
SELECT #SQLQuery = #SQLQuery + qryTxt FROM (
SELECT DISTINCT 'SELECT ''' + tables.name + ''', COUNT(DISTINCT CLIENTID) FROM ' + tables.name + ' UNION ' AS qryTxt
FROM sys.columns left join sys.tables on columns.object_id = tables.object_id where columns.name = CLIENTID AND isnull(tables.name, '') <> '') subquery
------------------------------------
-- REMOVE THE LAST 'UNION' KEYWORD FROM SQLQUERY
SET #SQLQuery = left(#sqlQuery, len(#sqlQuery) - 5)
------------------------------------
-- EXECUTE
execute sp_executesql #SQLQuery
I really dislike cursors and loops. Even though this is not going to be much difference for a performance perspective I like to share how you can leverage the system tables and dynamic sql to avoid using a cursor, while loop or temp tables for something like this.
This code is literally all you need to to do this.
declare #SQL nvarchar(max) = ''
select #SQL = #SQL + 'select TableName = ''' + t.name + ''', ClientID_Count = count(distinct clientID)
from ' + QUOTENAME(t.name) + ' UNION ALL '
from sys.tables t
join sys.columns c on c.object_id = t.object_id
where c.name = 'clientID'
select #SQL = left(#SQL, len(#SQL) - 10) --removes the last UNION ALL
select #SQL
--once your comfortable the dynamic sql is correct just uncomment the line below.
--exec sp_executesql #SQL
A similar pattern to other answers here, but this is how I would tackle it:
IF OBJECT_ID('#Tables', 'U') IS NOT NULL
DROP TABLE #Tables;
SELECT ID = IDENTITY(INT, 1, 1),
SchemaName = OBJECT_SCHEMA_NAME([object_id]),
TableName = OBJECT_NAME([object_id]),
ColumnName = name,
DistinctCount = 0
INTO #Tables
FROM sys.columns
WHERE name = 'CLIENTID';
DECLARE #ID INT = 1,
#MaxID INT = (SELECT MAX(ID) FROM #Tables);
WHILE #ID < #MaxID
BEGIN;
DECLARE #SQLCommand VARCHAR(MAX);
SELECT #SQLCommand = FORMATMESSAGE('
UPDATE #Tables SET DistinctCount = (
SELECT COUNT(DISTINCT %s) FROM %s.%s
)
WHERE ID = %i;',
QUOTENAME(ColumnName), QUOTENAME(SchemaName), QUOTENAME(TableName), ID)
FROM #Tables
WHERE ID = #ID;
EXEC (#SQLCommand);
SET #ID += 1;
END;
SELECT *
FROM #Tables;
I have a field namely Modified_Dt of type Datetime in all of my tables, to keep track of last modified date and time for a record.
Now, let's say I need to know which tables has records that has been modified recently(like today).
How do I write a query for that? How do I query multiple tables?
By the way, I am using MS SQL Server 2008 R2.
USE MASTER
GO
DECLARE #ObjectName NVARCHAR(255)
DECLARE TablesList CURSOR
FOR select object_name(object_id, db_id('DBStackExchange'))
from [DBStackExchange].sys.columns
where name = 'Modified_Dt'
OPEN TablesList
FETCH NEXT FROM TablesList INTO #ObjectName
WHILE ##FETCH_STATUS = 0
BEGIN
exec
( 'If exists ( SELECT 1 FROM DBStackExchange.dbo.[' + #ObjectName
+ ']
Where convert(varchar(20),Modified_Dt,103)>=convert(varchar(20),getdate(),103))
Print ''' + #ObjectName + '''
'
)
FETCH NEXT FROM TablesList INTO #ObjectName
END
CLOSE TablesList
DEALLOCATE TablesList
Note: Replace 'DBStackExchange' with your Database name
declare #T table (T_Name nvarchar(255), M datetime)
declare #T_Name nvarchar(255), #SQLT nvarchar(max)
declare c cursor for select name from sys.tables
open c
fetch next from c into #T_Name
while ##fetch_status = 0 begin
set #SQLT = 'select top 1 ''' + #T_Name + ''', Modified_Dt from ' + #T_Name + ' order by Modified_Dt desc'
insert #T
exec sp_executesql #SQLT
fetch next from c into #T_Name
end
close c
deallocate c
select * from #T where M >= dateadd(day,datediff(day,0,getdate()),0)
Here is an answer without cursor or temporary table
DECLARE #ColumnName AS nvarchar(40) = 'Modified_Dt';
DECLARE #ModifiedSince AS datetime = '20140709';
DECLARE #sql AS nvarchar(max) = '';
-- Build a query with UNION ALL between all tables containing #ColumnName
WITH AllTables AS (
SELECT SCHEMA_NAME(Tables.schema_id) AS SchemaName
,Tables.name AS TableName
,Columns.name AS ColumnName
FROM sys.tables AS Tables
INNER JOIN sys.columns AS Columns
ON Tables.object_id = Columns.object_id
WHERE Columns.name = #ColumnName
)
SELECT #sql = #sql +
'UNION ALL SELECT ' + QUOTENAME(TableName, '''') +
', ' + QUOTENAME(ColumnName) +
' FROM ' + QUOTENAME(TableName) + CHAR(13)
FROM AllTables;
-- Create a query which selects last change from all tables
SET #sql =
'WITH AllChanges(TableName, ModifiedTime) AS ( ' +
STUFF(#sql, 1, LEN('UNION ALL'), '') + -- Remove first UNION
') ' +
'SELECT TableName ' +
' ,MAX(ModifiedTime) ' +
'FROM AllChanges ' +
'WHERE ModifiedTime > #ModifiedSince '
'GROUP BY TableName '
EXECUTE sp_executesql #sql, N'#ModifiedSince datetime', #ModifiedSince
This is what I have so far to find all tables with more than 100 rows:
SELECT sc.name +'.'+ ta.name TableName
,SUM(pa.rows) RowCnt
FROM sys.tables ta
INNER JOIN sys.partitions pa
ON pa.OBJECT_ID = ta.OBJECT_ID
INNER JOIN sys.schemas sc
ON ta.schema_id = sc.schema_id
WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0) AND pa.rows >100
GROUP BY sc.name,ta.name,pa.rows
ORDER BY TABLENAME
Is there something similar where I can go through the database to find out a specific row data for a column within a table?
For example:
Where c.name = GUITARS and GUTARS = 'Fender'
Edit:
I do not have CREATE PROCEDURE permission OR CREATE TABLE
Just looking for any specific data under a certain column name, doesn't matter if it returns a lot of rows.
I dont know whether my solutions works for you or not. But instead of that i would use the query below to get all possible tables having guitar in any combination .
Select t.name, c.name
from sys.columns c
inner join sys.tables t
on c.object_id=t.object_id
Where c.name like '%guitar%'
Suppose it will give 20-25 tables depending on the no of tables and usage of guitar columns. You can see the resultset and can almost know your usable tables.
Now search for Fenders in your guessed items list.
I am saying so as I am working on maintenance of an erp app and it has 6000+ tables and 13000+ procedures. So whenever I need to find out the related tables , i just use the same trick and it works.
This is a simple stored procedure which can search through all the
data in the SQL Server database tables. Also this has capability to
search in the selected tables if the table names are specified with
comma separated values. This has a capability to generate the SQL
alone without executing the SQL. Enclosing the script version of it
also.
Parameters and usage:
#Tablenames -- Provide a single table name or multiple table name
with comma separated.
If left blank, it will check for all the tables in the database
#SearchStr -- Provide the search string. Use the '%' to coin the
search.
EX : X%--- will give data starting with X
%X--- will give data ending with X
%X%--- will give data containing X
#GenerateSQLOnly -- Provide 1 if you only want to generate the SQL
statements without searching the database.
By default it is 0 and it will search.
IF OBJECT_ID('SP_SearchTables','P') IS NOT NULL
DROP PROCEDURE SP_SearchTables
GO
CREATE PROCEDURE SP_SearchTables
#Tablenames VARCHAR(500)
,#SearchStr NVARCHAR(60)
,#GenerateSQLOnly Bit = 0
AS
SET NOCOUNT ON
DECLARE #MatchFound BIT
SELECT #MatchFound = 0
DECLARE #CheckTableNames Table
(
Tablename sysname
)
DECLARE #SQLTbl TABLE
(
Tablename SYSNAME
,WHEREClause VARCHAR(MAX)
,SQLStatement VARCHAR(MAX)
,Execstatus BIT
)
DECLARE #sql VARCHAR(MAX)
DECLARE #tmpTblname sysname
DECLARE #ErrMsg VARCHAR(100)
IF LTRIM(RTRIM(#Tablenames)) IN ('' ,'%')
BEGIN
INSERT INTO #CheckTableNames
SELECT Name
FROM sys.tables
END
ELSE
BEGIN
SELECT #sql = 'SELECT ''' + REPLACE(#Tablenames,',',''' UNION SELECT ''') + ''''
INSERT INTO #CheckTableNames
EXEC(#sql)
END
IF NOT EXISTS(SELECT 1 FROM #CheckTableNames)
BEGIN
SELECT #ErrMsg = 'No tables are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
INSERT INTO #SQLTbl
( Tablename,WHEREClause)
SELECT QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME),
(
SELECT '[' + SC.name + ']' + ' LIKE ''' + #SearchStr + ''' OR ' + CHAR(10)
FROM SYS.columns SC
JOIN SYS.types STy
ON STy.system_type_id = SC.system_type_id
AND STy.user_type_id =SC.user_type_id
WHERE STY.name in ('varchar','char','nvarchar','nchar')
AND SC.object_id = ST.object_id
ORDER BY SC.name
FOR XML PATH('')
)
FROM SYS.tables ST
JOIN #CheckTableNames chktbls
ON chktbls.Tablename = ST.name
JOIN SYS.schemas SCh
ON ST.schema_id = SCh.schema_id
WHERE ST.name <> 'SearchTMP'
GROUP BY ST.object_id, QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME) ;
UPDATE #SQLTbl
SET SQLStatement = 'SELECT * INTO SearchTMP FROM ' + Tablename + ' WHERE ' + substring(WHEREClause,1,len(WHEREClause)-5)
DELETE FROM #SQLTbl
WHERE WHEREClause IS NULL
WHILE EXISTS (SELECT 1 FROM #SQLTbl WHERE ISNULL(Execstatus ,0) = 0)
BEGIN
SELECT TOP 1 #tmpTblname = Tablename , #sql = SQLStatement
FROM #SQLTbl
WHERE ISNULL(Execstatus ,0) = 0
IF #GenerateSQLOnly = 0
BEGIN
IF OBJECT_ID('SearchTMP','U') IS NOT NULL
DROP TABLE SearchTMP
EXEC (#SQL)
IF EXISTS(SELECT 1 FROM SearchTMP)
BEGIN
SELECT Tablename=#tmpTblname,* FROM SearchTMP
SELECT #MatchFound = 1
END
END
ELSE
BEGIN
PRINT REPLICATE('-',100)
PRINT #tmpTblname
PRINT REPLICATE('-',100)
PRINT replace(#sql,'INTO SearchTMP','')
END
UPDATE #SQLTbl
SET Execstatus = 1
WHERE Tablename = #tmpTblname
END
IF #MatchFound = 0
BEGIN
SELECT #ErrMsg = 'No Matches are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
SET NOCOUNT OFF
go
By Sorna Kumar Muthuraj
Something I use at work really flexible useful piece of code.
If you don't have permissions to create procs just declare the variables being used in this script and execute script as ad-hoc query
DECLARE #Tablenames VARCHAR(500) = 'Table_Name'
DECLARE #SearchStr NVARCHAR(60) = 'Data_LookingFor'
DECLARE #GenerateSQLOnly Bit = 0
Your DBA really doesn't trust you does he :) Anyway, I have tweaked the code a little bit more making use of temp table rather than the Table variables, maybe this will work for you:
DECLARE #Tablenames VARCHAR(500) = 'Table_name'
DECLARE #SearchStr NVARCHAR(60) = 'Serach_String'
DECLARE #GenerateSQLOnly Bit = 0
SET NOCOUNT ON
DECLARE #MatchFound BIT
SELECT #MatchFound = 0
IF OBJECT_ID('tempdb..#CheckTableNames') IS NOT NULL
DROP TABLE #CheckTableNames
CREATE Table #CheckTableNames
(
Tablename sysname
)
IF OBJECT_ID('tempdb..#SQLTbl') IS NOT NULL
DROP TABLE #SQLTbl
CREATE TABLE #SQLTbl
(
Tablename SYSNAME
,WHEREClause VARCHAR(MAX)
,SQLStatement VARCHAR(MAX)
,Execstatus BIT
)
DECLARE #sql VARCHAR(MAX)
DECLARE #tmpTblname sysname
DECLARE #ErrMsg VARCHAR(100)
IF LTRIM(RTRIM(#Tablenames)) IN ('' ,'%')
BEGIN
INSERT INTO #CheckTableNames
SELECT Name
FROM sys.tables
END
ELSE
BEGIN
SELECT #sql = 'SELECT ''' + REPLACE(#Tablenames,',',''' UNION SELECT ''') + ''''
INSERT INTO #CheckTableNames
EXEC(#sql)
END
IF NOT EXISTS(SELECT 1 FROM #CheckTableNames)
BEGIN
SELECT #ErrMsg = 'No tables are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
INSERT INTO #SQLTbl
( Tablename,WHEREClause)
SELECT QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME),
(
SELECT '[' + SC.name + ']' + ' LIKE ''' + #SearchStr + ''' OR ' + CHAR(10)
FROM SYS.columns SC
JOIN SYS.types STy
ON STy.system_type_id = SC.system_type_id
AND STy.user_type_id =SC.user_type_id
WHERE STY.name in ('varchar','char','nvarchar','nchar')
AND SC.object_id = ST.object_id
ORDER BY SC.name
FOR XML PATH('')
)
FROM SYS.tables ST
JOIN #CheckTableNames chktbls
ON chktbls.Tablename = ST.name
JOIN SYS.schemas SCh
ON ST.schema_id = SCh.schema_id
WHERE ST.name <> 'SearchTMP'
GROUP BY ST.object_id, QUOTENAME(SCh.name) + '.' + QUOTENAME(ST.NAME) ;
UPDATE #SQLTbl
SET SQLStatement = 'SELECT * INTO SearchTMP FROM ' + Tablename + ' WHERE ' + substring(WHEREClause,1,len(WHEREClause)-5)
DELETE FROM #SQLTbl
WHERE WHEREClause IS NULL
WHILE EXISTS (SELECT 1 FROM #SQLTbl WHERE ISNULL(Execstatus ,0) = 0)
BEGIN
SELECT TOP 1 #tmpTblname = Tablename , #sql = SQLStatement
FROM #SQLTbl
WHERE ISNULL(Execstatus ,0) = 0
IF #GenerateSQLOnly = 0
BEGIN
IF OBJECT_ID('SearchTMP','U') IS NOT NULL
DROP TABLE SearchTMP
EXEC (#SQL)
IF EXISTS(SELECT 1 FROM SearchTMP)
BEGIN
SELECT Tablename = #tmpTblname,* FROM SearchTMP
SELECT #MatchFound = 1
END
END
ELSE
BEGIN
PRINT REPLICATE('-',100)
PRINT #tmpTblname
PRINT REPLICATE('-',100)
PRINT replace(#sql,'INTO SearchTMP','')
END
UPDATE #SQLTbl
SET Execstatus = 1
WHERE Tablename = #tmpTblname
END
IF #MatchFound = 0
BEGIN
SELECT #ErrMsg = 'No Matches are found in this database ' + DB_NAME() + ' for the specified filter'
PRINT #ErrMsg
RETURN
END
Please see my answer to How do I find a value anywhere in a SQL Server Database? where I provide a script to search all tables in a database.
A pseudo-code description of this would be be select * from * where any like 'foo'
It also allows you to search specific column names using standard like syntax, e.g. %guitar% to search column names that have the word "guitar" in them.
It runs ad-hoc, so you do not have to create a stored procedure, but you do need access to information_schema.
I use this script in SQL 2000 and up almost daily in my DB development work.
I have multiple table names like g_str_a , g_str_ab , g_str_abc . I would like to drop all those tables that start with g_str on SQL Server 2008.
Will DROP Tables like 'g_str' help?
Please help me with the script.
SELECT
'DROP TABLE ' + QUOTENAME(SCHEMA_NAME(schema_id)) + '.' + QUOTENAME(name) + ';'
FROM sys.tables
WHERE name LIKE 'g\_str%' ESCAPE '\'
Then review the script and run it.
You can also concatenate the result into a single string and execute with EXEC if you need an entirely automated solution.
You could use dynamic SQL:
DECLARE #SQL NVARCHAR(MAX) = '';
SELECT #SQL = #SQL + 'DROP TABLE ' + QUOTENAME(SCHEMA_NAME([Schema_ID])) + '.' + QUOTENAME([name]) + ';'
FROM sys.tables
WHERE Name LIKE 'g\_str%' ESCAPE('\');
EXECUTE SP_EXECUTESQL #SQL;
Following query will delete tables automatically:
BEGIN TRANSACTION
DECLARE #tmpTablesToDelete TABLE (
RowNumber INT PRIMARY KEY
,Query NVARCHAR(MAX)
)
INSERT INTO
#tmpTablesToDelete
SELECT
RowNumber = ROW_NUMBER() OVER (ORDER BY (SELECT (0)))
,'DROP TABLE '+schemas.name+'.'+objects.name AS Query
FROM
sys.objects
INNER JOIN
sys.schemas
ON
schemas.schema_id = objects.schema_id
WHERE
type = 'U' AND objects.name like 'g_str%'
DECLARE #Counter INT
SELECT #Counter = MAX(RowNumber) FROM #tmpTablesToDelete
WHILE(#Counter > 0) BEGIN
DECLARE #Query NVARCHAR(MAX)
SELECT #Query = Query FROM #tmpTablesToDelete WHERE RowNumber = #Counter
PRINT #Query
EXEC sp_executesql #statement = #Query
SET #Counter = #Counter - 1
END
COMMIT TRANSACTION