I'm trying to make a query that return the name of all columns for a table, and for each columns the count distinct. I have more than 1400 tables to test, with some with 100 columns, so I can't imagine tiping colomn names one by one.
I have problem for the count disctinct part, And I whant to know if it is possible to do something like an EXECUTE IMMEDIATE in a subquery, and if no, if there is an other solution ?
Here is my actual query :
SELECT
sc.name AS columnName
, ('SELECT COUNT(DISTINCT ' || sc.name || ') FROM MyTableName') AS nb_distinct_row
FROM dbo.syscolumns sc INNER JOIN sysobjects so
ON so.id = sc.id
AND so.name = 'MyTableName'
GROUP BY sc.name
This return the good subquery but I don't know how to execute it immediatly ?
I've tried something like
, (SELECT count(distinct sc.name) from MyTableName) As nbDistinctRow
But the 'sc.name' is not interpreted and the count distinct return 1, so that's why I'm trying this way.
I work on a sybase IQ Database
Anyone can help me ?
thank you in advance.
I have found a way to make this work, but it's realy clumsy.
CREATE OR REPLACE PROCEDURE FLA_distinctCols(in table_obj_id INT)
RESULT (column_name VARCHAR(128), count_distinct INT)
BEGIN
DECLARE err_notfound EXCEPTION FOR SQLSTATE VALUE '02000';
DECLARE #tablename VARCHAR(100);
DECLARE #cols VARCHAR(128);
DECLARE #nb_dist INT;
DECLARE #sql VARCHAR(30000);
DECLARE #sqltemp VARCHAR(30000);
DECLARE tables NO SCROLL CURSOR FOR
SELECT
sc.name col
, ('SELECT COUNT(DISTINCT ' || sc.name || ') INTO #nb_dist FROM ' || #tablename)
FROM dbo.syscolumns sc INNER JOIN sysobjects so
ON so.id = sc.id
AND so.name = #tablename
|| '%' ORDER BY sc.name
;
SELECT so.name INTO #tablename FROM sysobjects so WHERE so.id = table_obj_id;
create table #tablestats (
column_name varchar(128) not null,
count_distinct INT,
);
open tables WITH HOLD;
LoopTables: loop
fetch next tables into #cols, #sqltemp;
if sqlstate = err_notfound then
leave LoopTables
else
EXECUTE IMMEDIATE WITH QUOTES #sqltemp;
set #sql= 'INSERT INTO #tablestats SELECT ''' || #cols || ''', ' || #nb_dist || ';';
EXECUTE IMMEDIATE WITH QUOTES #sql;
end if
end loop LoopTables;
close tables;
SELECT column_name, count_distinct FROM #tablestats ORDER BY count_distinct DESC;
END
GO
BEGIN
DECLARE #tablename VARCHAR(128);
DECLARE #tableid INT;
SET #tablename = 'Mytablename';
SELECT so.id INTO #tableid FROM sysobjects so WHERE so.name = #tablename;
SELECT * FROM FLA_distinctCols(#tableid);
END
Any other solution ?
Related
I have to check for value existence in a subset of tables in a subset of databases of a sql server instance. Beware I need to do this because I have 30 databases with same schema name and similar structure. Querying all databases separately is a waste of time.
The query generates correctly code for existing tables, but the additional check for column existence in table fails.
The column in some tables does not exist so the generated code must not include queries on tables without this column.
To solve this I need to realiably find a way to join sys.databases with sys.tables and then sys.columns. Or an alternative way to query all the required databases in a time saving manner.
SET NOCOUNT ON;
IF OBJECT_ID (N'tempdb.dbo.#temp') IS NOT NULL
DROP TABLE #temp
CREATE TABLE #temp
(
exist INT
, DB VARCHAR(50)
, tbname VARCHAR(500)
)
/*tables common root,
all tables i need to query start with this prefix and a number between 1 and 50
and some resulting tables do not exist
ex: dbo.Z_WBL_ASCHEDA23 exist in wbcto, while dbo.Z_WBL_ASCHEDA23 does not exist in db wbgtg
*/
DECLARE #TableName NVARCHAR(200)
SELECT #TableName = 'dbo.Z_WBL_ASCHEDA'
DECLARE #SQL NVARCHAR(MAX)
;WITH n(n) AS
(
SELECT 1
UNION ALL
SELECT n+1 FROM n WHERE n < 50
)
SELECT #SQL = STUFF((
SELECT CHAR(13)+'SELECT COUNT(1), ''' + db.name + ''', '''+
#TableName+CONVERT(VARCHAR, n.n)+''' FROM ' +#TableName+CONVERT(VARCHAR, n.n)
+ ' WHERE COALESCE(s_dettagli,'''') = ''CONTROLLATO'' '
+CHAR(13)
FROM sys.databases db
INNER JOIN n ON 1=1
INNER JOIN sys.tables t ON OBJECT_ID(db.name + '.' + #TableName+CONVERT(VARCHAR, n.n)) IS NOT NULL
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID and c.name = 's_dettagli'
/*join on columns not working, generates sql for tables without 's_dettagli' column and query fails*/
WHERE db.name like 'wb%' --check only databases starting with 'wb'
FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
select #SQL
INSERT INTO #temp (exist, DB, tbname)
EXEC sys.sp_executesql #SQL
SELECT *
FROM #temp t
where exist <> 0
EDIT: adding some sql generated from query
SELECT COUNT(1), 'wb360', 'dbo.Z_WBL_ASCHEDA23' FROM wb360.dbo.Z_WBL_ASCHEDA23 WHERE COALESCE(s_dettagli,'') = 'CONTROLLATO'
SELECT COUNT(1), 'Wbbim', 'dbo.Z_WBL_ASCHEDA32' FROM Wbbim.dbo.Z_WBL_ASCHEDA32 WHERE COALESCE(s_dettagli,'') = 'CONTROLLATO'
the table of first query doesn't contain 's_dettagli' column
EDIT2: SOLUTION
EXEC sp_MSforeachdb '
IF ''?'' not like ''wb%''
RETURN
USE [?]
EXEC sp_MSforeachtable
#replacechar = ''!'',
#command1 = ''SELECT ''''?'''' AS db_name, ''''!'''' AS table_name, COUNT(*) FROM ! '',
#whereand = '' And Object_id In (
Select t.Object_id
From sys.objects t
INNER JOIN sys.columns c on c.Object_id = t.Object_id
Where t.name like ''''Z_WBL_ASCHEDA%''''
AND c.name = ''''s_dettagli'''' )'' '
Sys.columns can be joined to sys.tables using the object_id field (the object_id is the representation of the table itself).
sys.tables is run in the context of the database you are querying, hence you cannot see a table contained in another database. sys.databases can be run on any database on an instance and allow you to view other databases on the same instance. As such you don't need to join the table to the database (also the reason why there is no database_id field within sys.tables).
I hope that helps. Any clarification please let me know.
I would suggest alternative ways:
use registered Servers in SSMS and run the script on each database here
use exec sys.sp_MSforeachdb here
use sqlcmd and powershell to switch databases
I believe this script can help you :
SET NOCOUNT ON;
IF OBJECT_ID (N'tempdb.dbo.#Temp') IS NOT NULL
DROP TABLE #Temp
CREATE TABLE #Temp
(
exist INT
, DB VARCHAR(50)
, tbname VARCHAR(500)
)
DECLARE #SchemaName NVARCHAR(200)
DECLARE #TableName NVARCHAR(200)
DECLARE #ColumnName NVARCHAR(200)
DECLARE #SearchText NVARCHAR(200)
DECLARE #DBNameStartWith NVARCHAR(200)
DECLARE #SQL NVARCHAR(MAX)
SET #DBNameStartWith = 'wb'
SET #SchemaName = 'dbo'
SET #TableName = 'Z_WBL_ASCHEDA'
SET #ColumnName = 's_dettagli'
SET #SearchText = 'CONTROLLATO'
DECLARE #DatabaseName varchar(100)
DECLARE Crsr CURSOR FOR
SELECT name
FROM MASTER.sys.sysdatabases
WHERE name LIKE ''+#DBNameStartWith+'%'
OPEN Crsr
FETCH NEXT FROM Crsr INTO #DatabaseName
WHILE ##FETCH_STATUS = 0
BEGIN
IF ISNULL((SELECT COUNT(1) FROM SYS.TABLES T,SYS.COLUMNS C WHERE T.object_id=C.object_id AND T.name=#TableName AND C.name=#ColumnName),0)>0
BEGIN
SET #SQL = '
IF EXISTS (SELECT 1 FROM '+#DatabaseName+'.SYS.TABLES T,'+#DatabaseName+'.SYS.COLUMNS C WHERE T.object_id=C.object_id AND T.name='''+#TableName+''' AND C.name='''+#ColumnName+''')
BEGIN
SELECT COUNT(1),'''+#DatabaseName+''','''+#TableName+'''
FROM '+#DatabaseName+'.'+#SchemaName+'.'+#TableName+'
WHERE '+#ColumnName+'=''' +#SearchText+'''
END'
PRINT(#SQL)
INSERT INTO #Temp
EXEC sp_executesql #SQL
END
FETCH NEXT FROM Crsr INTO #DatabaseName
END
CLOSE Crsr
DEALLOCATE Crsr
SELECT * FROM #Temp
Currently i have to create a list of all tables & schemes used in several (terribly) long SQL statements.
Of course i could go manually through the SQL statements and write down every table used in a JOIN, Subselect and so on.
But i'd be curious if there is any easier way to do it. maybe with a "simple" SQL statement, but i have no clue how to do it.
Why am i asking? I'd have to do this for about 50 SQL-Unload-Statements, where all of them use between 30 and 70 tables. I guess you can imagine this quite boring work
Thanks in advance for any input & hints!
Have a read here: How can i get the list of tables in the stored procedure
;WITH stored_procedures AS (
SELECT
o.name AS proc_name, oo.name AS table_name,
ROW_NUMBER() OVER(partition by o.name,oo.name ORDER BY o.name,oo.name) AS row
FROM sysdepends d
INNER JOIN sysobjects o ON o.id=d.id
INNER JOIN sysobjects oo ON oo.id=d.depid
WHERE o.xtype = 'P')
SELECT proc_name, table_name FROM stored_procedures
WHERE row = 1
ORDER BY proc_name,table_name
All credit to the OP of the code above in the thread above.
I will post this answer & mark it as solved, as it was the best and easiest way to solve my issue.
Hint was in a comment by #whereisSQL (thanks a lot!)
Seems like it was already asked in this thread, but i didn't find it:
https://dba.stackexchange.com/questions/121346/need-to-get-identify-all-tables-and-columns-in-a-sql-query/121355#121355
There is an online "get table column" tool to list the tables of a SQL statement here:
http://107.170.101.241:8080/getTableColumn/
It lists all tables and additionally columns used in the statement! Perfect solution in my case.
This may help. Using DMVs
IF EXISTS (
SELECT *
FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[sp_dependsobj]')
AND type IN (
N'P'
,N'PC'
)
)
DROP PROCEDURE [dbo].[sp_dependsobj]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[sp_dependsobj] (#Objname NVARCHAR(2000))
AS
BEGIN
SET NOCOUNT ON
DECLARE #ObjID INTEGER
DECLARE #ObjType VARCHAR(100)
DECLARE #RowCount INTEGER = 0
SELECT #ObjID = OBJECT_ID(#Objname)
SELECT #ObjType = TYPE
FROM sys.objects
WHERE object_id = #ObjID
DECLARE #RefObjects AS TABLE (
[Object_name] SYSNAME
,[Type] VARCHAR(255)
,referenced_entity_name SYSNAME
,Column_name SYSNAME NULL
,referenced_entity_type VARCHAR(255)
)
DECLARE #FoundIn AS TABLE (
[Object_name] SYSNAME
,[Found In] SYSNAME
,[Type] VARCHAR(255)
)
DECLARE #SQLStr VARCHAR(MAX)
SET #SQLStr = '
WITH CTE_Objects
AS
(
SELECT o.NAME referencing_entity_name
,o.type_desc referencing_object_type
,sed.referenced_entity_name
,refobj.referenced_minor_name
,obj.type_desc
,obj.object_id
FROM sys.sql_expression_dependencies sed
INNER JOIN sys.objects o ON sed.referencing_id = o.[object_id]
INNER JOIN sys.objects obj ON sed.referenced_entity_name = obj.name
INNER JOIN sys.dm_sql_referenced_entities(''dbo.' + #Objname + ''', ''OBJECT'') refobj ON
refobj.referenced_id = sed.referenced_id
WHERE o.NAME = ''' + #Objname + '''
UNION
SELECT ''' + #Objname + ''', (SELECT type_desc from sys.objects where name = ''' + #Objname + '''), referenced_entity_name, NULL, obj.type_desc
,obj.object_id
FROM sys.dm_sql_referenced_entities (''dbo.' + '' + #Objname +
''', ''OBJECT'') refObj INNER JOIN sys.objects obj
ON refObj.referenced_entity_name = obj.name
)
SELECT CTE.referencing_entity_name Object_name, CTE.referencing_object_type Type, CTE.referenced_entity_name, CTE.referenced_minor_name Column_name, CTE.type_desc referenced_entity_type
FROM CTE_Objects CTE LEFT JOIN sys.columns cl ON
cte.object_id = cl.object_id AND cte.referenced_minor_name = cl.name
Order by cte.referencing_entity_name, CASE WHEN cte.referencing_entity_name IS NULL THEN 0 ELSE cl.column_id END
'
INSERT INTO #RefObjects (
[Object_name]
,[Type]
,referenced_entity_name
,Column_name
,referenced_entity_type
)
EXEC (#SQLStr)
SET #RowCount = ##ROWCOUNT
IF #RowCount > 0
BEGIN
SELECT *
FROM #RefObjects
END
SET #SQLStr = '
SELECT DISTINCT [Object Name] = o.NAME
,[Found In] = sp.NAME
,sp.type_desc Type
FROM sys.objects o
INNER JOIN sys.sql_expression_dependencies sd ON o.object_id = sd.referenced_id
INNER JOIN sys.objects sp ON sd.referencing_id = sp.object_id
WHERE o.NAME = ''' + #Objname + '''
UNION
SELECT ''' + #Objname + ''', referencing_entity_name, (SELECT type_desc from sys.objects where name = referencing_entity_name)
FROM sys.dm_sql_referencing_entities (''dbo.' + '' + #Objname + ''', ''OBJECT'');
'
INSERT INTO #FoundIn (
[Object_name]
,[Found In]
,[Type]
)
EXEC (#SQLStr)
SET #RowCount = ##ROWCOUNT
IF #RowCount > 0
BEGIN
SELECT *
FROM #FoundIn
END
IF NOT EXISTS (
SELECT 1
FROM #RefObjects
)
AND NOT EXISTS (
SELECT 1
FROM #FoundIn
)
BEGIN
PRINT 'Object does not reference any object, and no objects reference it.'
END
SET NOCOUNT OFF
END
GO
The question is old, but here is a regex for those that want the tables used in SQL statement (From/join).
I created it specially for my case, but it may be adapt and useful for others:
(from|join)[ ]{1,}[^.\n\ ]+?(?=(.))[.].*?(?=( |\n))
I am using SQL Server 2014 and I have the following T-SQL query which joins 2 tables:
SELECT a.*, b.* FROM TEMP a
INNER JOIN Extras b ON b.ResaID = a.ResaID
I would like to pull ALL the columns from TEMP and all the columns from "Extras" with the exception of the ResaID column as it is already included in a.* in the above query. Basically, I want to pull a.* + b.* (excluding b.ResaID).
I know I can write the query in the form:
Select a.*, b.column2, b.column3,...
but since b.* has got around 40 columns, is there a way to write the query in a more simplified way to exclude b.ResaID, rather than specify each of the columns in the "Extras" table?
Unfortunately, there is no such syntax. You could either use asterisks (*) and just ignore the duplicated column in your code, or explicitly list the columns you need.
You should create a view and select the columns you need from that view. Here is a script that will generate that view for you:
DECLARE #table1 nvarchar(20) = 'temp'
DECLARE #table1key nvarchar(20) = 'ResaID'
DECLARE #table2 nvarchar(20) = 'Extras'
DECLARE #table2key nvarchar(20) = 'ResaID'
DECLARE #viewname varchar(20) = 'v_myview'
DECLARE #sql varchar(max) = ''
SELECT #sql += '], a.[' + column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = #table1
SELECT #sql += '], b.[' + column_name
FROM
(
SELECT column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = #table2
EXCEPT
SELECT column_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = #table1
) x
SELECT
#sql = 'CREATE view ' +#viewname+ ' as SELECT '
+ STUFF(#sql, 1, 3, '') + '] FROM ['
+#table1+ '] a JOIN ['+ #table2
+'] b ON ' + 'a.' + #table1key + '=b.' + #table2key
EXEC(#sql)
You can simply solve this using a dynamic sql query.
DECLARE #V_SQL AS NVARCHAR(2000)='' --variable to store dynamic query
,#V_TAB1 AS NVARCHAR(200)='TEMP' --First Table
,#V_TAB2 AS NVARCHAR(200)='Extras' --Second Table
,#V_CONDITION AS NVARCHAR(2000)='A.ResaID = B.ResaID' --Conditions
SELECT #V_SQL = STUFF(
( SELECT ', '+TCOL_NAME
FROM
( SELECT 'A.'+S.NAME AS TCOL_NAME
FROM SYSCOLUMNS AS S
WHERE OBJECT_NAME(ID) = #V_TAB1
UNION ALL
SELECT 'B.'+S.NAME
FROM SYSCOLUMNS AS S
WHERE OBJECT_NAME(ID) = #V_TAB2
AND S.NAME NOT IN (SELECT S.NAME
FROM SYSCOLUMNS AS S
WHERE OBJECT_NAME(ID) = #V_TAB1)
) D
FOR XML PATH('')
),1,2,'')
EXECUTE ('SELECT '+#V_SQL+'
FROM '+#V_TAB1+' AS A
INNER JOIN '+#V_TAB2+' AS B ON '+#V_CONDITION+' ')
Does anyone know how to check a a variable against all database table with columns storing the same type of information? I have a poorly designed database that stores ssn in over 60 tables within one database. some of the variations of columns in the various tables include:
app_ssn
ca_ssn
cand_ssn
crl_ssn
cu_ssn
emtaddr_ssn
re_ssn
sfcart_ssn
sfordr_ssn
socsecno
ssn
Ssn
SSN
I want to create a stored procedure that will accept a value and check it against every table that has 'ssn' in the name.Does anyone have idea as to how to do this?
-- I assume that table/column names don't need to be surrounded by square braces. You may want to save matches in a table - I just select them. I also assume ssn is a char.
alter proc proc1
#search1 varchar(500)
as
begin
set nocount on
declare #strsql varchar(500)
declare #curtable sysname
declare #prevtable sysname
declare #column sysname
select top 1 #curtable= table_schema+'.'+table_name, #column=column_name
from INFORMATION_SCHEMA.COLUMNS
where CHARINDEX('ssn',column_name) > 0
order by table_schema+'.'+table_name +column_name
-- make sure that at least one column has ssn in the column name
if #curtable is not null
begin
while (1=1)
begin
set #strsql = 'select * from ' +#curtable +' where '+''''+#search1+''''+ ' = '+#column
print #strsql
-- any matches for passed in ssn will match here...
exec (#strsql)
set #prevtable = #curtable+#column
select top 1 #curtable= table_schema+'.'+table_name, #column=column_name
from INFORMATION_SCHEMA.COLUMNS
where CHARINDEX('ssn',column_name) > 0
and table_schema+'.'+table_name +column_name> #prevtable
order by table_schema+'.'+table_name +column_name
-- when we run out of columns that contain ssn we are done...
if ##ROWCOUNT = 0
break
end
end
end
What you will need to do is some research. But here is where you can start;
SELECT tbl.NAME AS TableName
,cl.NAME AS ColumnName
,IDENTITY(INT, 1, 1) AS ID
INTO #ColumnsToLoop
FROM sys.tables tbl
JOIN sys.columns cl ON cl.object_id = tbl.object_id
This will give you the table / column relation then you can simply build a dynamic SQL string based on each row in the query above (basically loop it) and use EXEC or sp_execsql. So basically;
DECLARE #Loop int = (select min(ID) From #ColumnsToLoop),#MX int = (Select MAX(ID) From #ColumnsToLoop)
WHILE(#Loop<=#MX)
BEGIN
DECLARE #SQL nvarchar(MAX) = 'SQL String'
//Construct the dynamic SQL String
EXEC(#SQL);
SET #Loop += 1
END
Perhaps I went a little too crazy with this one, but let me know. I thought it would best the primary key of the search results with the table name so you could join it to your tables. I also managed to do it without a single cursor or loop.
DECLARE #SSN VARCHAR(25) = '%99%',
#SQL VARCHAR(MAX);
WITH CTE_PrimaryKeys
AS
(
SELECT TABLE_CATALOG,
TABLE_SCHEMA,
TABLE_NAME,
column_name
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE D
WHERE OBJECTPROPERTY(OBJECT_ID(constraint_name), 'IsPrimaryKey') = 1
),
CTE_Columns
AS
(
SELECT A.*,
CONCAT(A.TABLE_CATALOG,'.',A.TABLE_SCHEMA,'.',A.TABLE_NAME) AS FullTableName,
CASE WHEN B.COLUMN_NAME IS NOT NULL THEN 1 ELSE 0 END AS IsPrimaryKey
FROM INFORMATION_SCHEMA.COLUMNS A
LEFT JOIN CTE_PrimaryKeys B
ON A.TABLE_CATALOG = B.TABLE_CATALOG
AND A.TABLE_SCHEMA = B.TABLE_SCHEMA
AND A.TABLE_NAME = B.TABLE_NAME
AND A.COLUMN_NAME = B.COLUMN_NAME
),
CTE_Select
AS
(
SELECT
'SELECT ' +
--This returns the pk_col casted as Varchar and the table name in another columns
STUFF((SELECT ',CAST(' + COLUMN_NAME + ' AS VARCHAR(MAX)) AS pk_col,''' + B.TABLE_NAME + ''' AS Table_Name'
FROM CTE_Columns B
WHERE A.Table_Name = B.TABLE_NAME
AND B.IsPrimaryKey = 1
FOR XML PATH ('')),1,1,'')
+ ' FROM ' + fullTableName +
--This is where I list the columns where LIKE desired SSN
' WHERE ' +
STUFF((SELECT COLUMN_NAME + ' LIKE ''' + #SSN + ''' OR '
FROM CTE_Columns B
WHERE A.Table_Name = B.TABLE_NAME
--This is where I filter so I only get desired columns
AND (
--Uncomment the Collate if your database is case sensitive
COLUMN_NAME /*COLLATE SQL_Latin1_General_CP1_CI_AS*/ LIKE '%ssn%'
--list your column Names that don't have ssn in them
--OR COLUMN_NAME IN ('col1','col2')
)
FOR XML PATH ('')),1,0,'') AS Selects
FROM CTE_Columns A
GROUP BY A.FullTableName,A.TABLE_NAME
)
--Unioning them all together and getting rid of last trailing "OR "
SELECT #SQL = COALESCE(#sql,'') + SUBSTRING(selects,1,LEN(selects) - 3) + ' UNION ALL ' + CHAR(13) --new line for easier debugging
FROM CTE_Select
WHERE selects IS NOT NULL
--Look at your code
SELECT SUBSTRING(#sql,1,LEN(#sql) - 11)
I am using SQL Server. I want to add a single column named [DateCreated] to multiple tables. Is it possible that with a single statement I could add this column to all the tables in my database?
I stumble upon an answer by Joe Steffaneli in which he suggested a query which in turn returns rows consisting Alter table statements.
Query is as follows :
select 'alter table ' + quotename(s.name) + '.' + quotename(t.name) + ' add [DateModified] datetime'
from sys.columns c
inner join sys.tables t
on c.object_id = t.object_id
inner join sys.schemas s
on t.schema_id = s.schema_id
left join sys.columns c2
on t.object_id = c2.object_id
and c2.name = 'DateModified'
where c.name = 'DateCreated'
and t.type = 'U'
and c2.column_id is null /* DateModified column does not already exist */
Is there any way that I can execute returned rows? Sorry for English.
You probably need something like this. Check that the script does what you want before running it (adds a non null column with a default value of getdate())!
DECLARE #Dynsql nvarchar(max)
SET #Dynsql = ''
SELECT #Dynsql = #Dynsql + '
alter table ' + QUOTENAME(SCHEMA_NAME(schema_id))+ '.' + QUOTENAME(name) +
' add [DateCreated] datetime not null default getdate()'
FROM sys.tables
WHERE type='U' and object_id NOT IN (select object_id from sys.columns where name='DateCreated')
EXEC (#Dynsql)
You can use this query
I use the where clause in this query (it is optional) to find all tables that have ID and add the new field to them.
you can change where clause for example find all tables that have BusinessId column and add new filed or remove where clause and add for all tables
DECLARE #SQL varchar(max)
SELECT #SQL= STUFF((SELECT ';' + 'ALTER TABLE ' + t.TABLE_SCHEMA+'.' +t.TABLE_NAME+ ' ADD newfield nvarchar(max)'
from information_schema.tables t
inner join information_schema.columns c on c.table_name = t.table_name
and c.table_schema = t.table_schema
where c.column_name = 'id'
and t.table_schema not in ('information_schema', 'pg_catalog')
and t.table_type = 'BASE TABLE'
FOR XML PATH('')),1,1,'')
EXEC (#SQL)
This stored procedure works fine
USE databaseName;
exec sp_msforeachtable 'alter table ? Add [DateCreated] datetime not null default getdate()';
declare #i int
set #i=1
while(#i<45)
begin
declare #sql varchar(200)
with TempTable as (select Row_number() over(order by stdID) as RowNo,* from SomeTable)
select #sql= 'alter table Table'+(select Name from TempTable where RowNo=#i)+' add NewColumn int'
exec (#sql)
set #i=#i+1
end
No, there is no single statement that will add a column to all the tables in your database.
Next time please tag your question with the RDBMS you're using. If there were a way, we wouldn't be able to give you the command without knowing which database system you are using.