I have two solutions to select some data from a table.
SOLUTION 1
SELECT [ID]
,[SPAU10_EA]
,[SPAU10_EQ]
,[SPAU10_ore1]
,[SPAU10_nivel]
,[DateTime]
FROM [dbo].[TblSPAU10]
SOLUTION 2
I have a stored procedure with parameters which returns the same result as the above query. SP's query is like:
ALTER PROCEDURE [dbo].[PS_SpauOPompa]
#DataStart datetime,
#DataStop datetime,
#val int
AS
BEGIN
SET NOCOUNT ON;
declare #sql NVARCHAR(max)
declare #col1 varchar (25)
declare #col2 varchar(25)
declare #col3 varchar (25)
declare #col4 varchar (25)
declare #col5 varchar (25)
declare #col6 varchar (25)
set #col1='ID'
set #col2='SPAU'+CONVERT(VARCHAR, #val)+'_EA'
set #col3='SPAU'+CONVERT(VARCHAR, #val)+'_EQ'
set #col4='SPAU'+CONVERT(VARCHAR, #val)+'_ore1'
set #col5='SPAU'+CONVERT(VARCHAR, #val)+'_nivel'
set #col6='DateTime'
set #sql= 'select [ID], ' + #col2 + ',' + #col3 + ',' + #col4 + ',' + #col5 + ',' + #col6 + ' FROM [DBRap].[dbo].[TblSPAU'+CONVERT(VARCHAR, #val)+ '] WHERE DateTime between '''+CONVERT(VARCHAR(25), #DataStart,121)+ ''' and '''+CONVERT(VARCHAR(25), #DataStop,121)+''';'
print #sql;
EXEC sp_executesql
#sql,
N'#DataStart datetime, #DataStop datetime, #val int',
#DataStart, #DataStop, #val;
END
--execute [PS_SpauOPompa] '2018-12-13 15:58:46.940', '2018-12-21 10:51:10.713', 10
I'd like to combine the two solutions, meaning that instead of #sql string to put the select query from first solution. The problem I'm facing now is: how to convert from varchar variables to [column_name]?
I tried, unsuccessfully, in sp something like this:
SELECT #col1
,#col2
,#col3
,#col4
,#col5
,#col6
FROM [dbo].[TblSPAU10]
Use cast instead of convert. Try this with all dynamic variable set command.
set #col2='SPAU'+cast(#val as varchar)+'_EA'
Related
I am trying to sort a string such as '3,9,6' to '3,6,9' with TSQL. My approach was extracting the characters from the string, casting them as integers and putting them into a #temptable using a primary key for sorting. For this I created this procedure:
create proc sortstring(#string varchar(50))
as
declare #limit int = len(#string)
declare #counter int = 1
declare #temps char
create table #temptable (tempstring varchar(30) primary key)
while #counter<=#limit
begin
set #temps = SUBSTRING(#string,#counter,1)
if(#temps!=',')
insert into #temptable values (CAST(#temps as int))
set #counter= #counter+1
end
After this process, I was thinking to extract the integers from #temptable with a while loop to create the sorted string format '3,6'9'. But I think my whole approach is not performance efficient.
Any suggestions?
Below method should be a bit better than the while loop
declare #string varchar(255) = '3,9,6,0,5,12,88,15,23,45,77,88,125,1'
declare #TableList table (tmpStr int)
DECLARE #XML XML
SET #XML = '<root><csv>' + replace(#string, ',', '</csv><csv>') + '</csv></root>'
INSERT #TableList
SELECT replace(Word.value('.', 'integer'), CHAR(10), '')
FROM #XML.nodes('/root/csv') AS WordList(Word)
select * from #TableList order by 1
go
IF OBJECT_ID('tempdb.dbo.#TableList') IS NOT NULL
DROP TABLE #TableList
create table #TableList (tmpStr int)
declare #string varchar(255) = '3,9,6,0,5,12,88,15,23,45,77,88,125,1'
SET #string = 'SELECT ' + REPLACE(#string,',',' UNION ALL SELECT ')
SET #string='INSERT INTO #TableList (tmpStr) ' + #string
EXEC( #string)
SELECT * FROM #TableList ORDER BY tmpStr
Its not a conventional approach but it runs fast.
I want to write the store procedure in mysql where I want to add "where clause"
dynamically
I have written the Sp but Its Giving an error
Please Help
CREATE PROCEDURE GetStudent(
#Center varchar(20)=null,
#Gender varchar(20) = null,
#yrOf10 date= null,
#Designation varchar(20)= null,)
AS DECLARE #Query VARCHAR(100);DECLARE #ParamDefinition NVARCHAR(2000);
SET #Query = ' SELECT * FROM Student WHERE 1=1';IF #Center IS NOT NULL
SET #Query = #Query + ' AND Center= #Center ';IF #Gender IS NOT NULL SET #Query = #Query + ' AND Gender=#Gender ';IF #yrOf10 IS NOT NULL SET #Query = #Query + ' AND yrOfPassing10=#yrOf10 ';IF #Designation IS NOT NULL SET #Query = #Query + ' AND Designation=#Designation';
You can not use the # sign in an object name http://dev.mysql.com/doc/refman/5.0/en/identifiers.html.
I don't know why you have prefixed everything with #. Did you start out with MS SQL or something?
Anyway to decalre a local var you use DECLARE http://dev.mysql.com/doc/refman/5.0/en/declare-local-variable.html
Is there a way I can convert a SQL Server 2008 Table to HTML table text, without knowing the structure of the table first?
I tried this:
USE [Altiris]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[spCustomTable2HTML] (
#TABLENAME NVARCHAR(500),
#OUTPUT NVARCHAR(MAX) OUTPUT,
#TBL_STYLE NVARCHAR(1024) = '',
#HDR_STYLE NVARCHAR(1024) = '')
AS
-- #exec_str stores the dynamic SQL Query
-- #ParmDefinition stores the parameter definition for the dynamic SQL
DECLARE #exec_str NVARCHAR(MAX)
DECLARE #ParmDefinition NVARCHAR(500)
--We need to use Dynamic SQL at this point so we can expand the input table name parameter
SET #exec_str= N'
DECLARE #exec_str NVARCHAR(MAX)
DECLARE #ParmDefinition NVARCHAR(500)
--Make a copy of the original table adding an indexing columnWe need to add an index column to the table to facilitate sorting so we can maintain the
--original table order as we iterate through adding HTML tags to the table fields.
--New column called CustColHTML_ID (unlikely to be used by someone else!)
--
select CustColHTML_ID=0,* INTO #CustomTable2HTML FROM ' + #TABLENAME + '
--Now alter the table to add the auto-incrementing index. This will facilitate row finding
DECLARE #COUNTER INT
SET #COUNTER=0
UPDATE #CustomTable2HTML SET #COUNTER = CustColHTML_ID=#COUNTER+1
-- #HTMLROWS will store all the rows in HTML format
-- #ROW will store each HTML row as fields on each row are iterated through
-- using dymamic SQL and a cursor
-- #FIELDS will store the header row for the HTML Table
DECLARE #HTMLROWS NVARCHAR(MAX) DECLARE #FIELDS NVARCHAR(MAX)
SET #HTMLROWS='''' DECLARE #ROW NVARCHAR(MAX)
-- Create the first HTML row for the table (the table header). Ignore our indexing column!
SET #FIELDS=''<tr ' + #HDR_STYLE + '>''
SELECT #FIELDS=COALESCE(#FIELDS, '' '','''')+''<td>'' + name + ''</td>''
FROM tempdb.sys.Columns
WHERE object_id=object_id(''tempdb..#CustomTable2HTML'')
AND name not like ''CustColHTML_ID''
SET #FIELDS=#FIELDS + ''</tr>''
-- #ColumnName stores the column name as found by the table cursor
-- #maxrows is a count of the rows in the table, and #rownum is for marking the
-- ''current'' row whilst processing
DECLARE #ColumnName NVARCHAR(500)
DECLARE #maxrows INT
DECLARE #rownum INT
--Find row count of our temporary table
SELECT #maxrows=count(*) FROM #CustomTable2HTML
--Create a cursor which will look through all the column names specified in the temporary table
--but exclude the index column we added (CustColHTML_ID)
DECLARE col CURSOR FOR
SELECT name FROM tempdb.sys.Columns
WHERE object_id=object_id(''tempdb..#CustomTable2HTML'')
AND name not like ''CustColHTML_ID''
ORDER BY column_id ASC
--For each row, generate dymanic SQL which requests the each column name in turn by
--iterating through a cursor
SET #rowNum=0
SET #ParmDefinition=N''#ROWOUT NVARCHAR(MAX) OUTPUT,#rowNum_IN INT''
While #rowNum < #maxrows
BEGIN
SET #HTMLROWS=#HTMLROWS + ''<tr>''
SET #rowNum=#rowNum +1
OPEN col
FETCH NEXT FROM col INTO #ColumnName
WHILE ##FETCH_STATUS=0
BEGIN
--Get nth row from table
--SET #exec_str=''SELECT #ROWOUT=(select top 1 ['' + #ColumnName + ''] from (select top '' + cast(#rownum as varchar) + '' * from #CustomTable2HTML order by CustColHTML_ID ASC) xxx order by CustColHTML_ID DESC)''
SET #exec_str=''SELECT #ROWOUT=(select ['' + #ColumnName + ''] from #CustomTable2HTML where CustColHTML_ID=#rowNum_IN)''
EXEC sp_executesql
#exec_str,
#ParmDefinition,
#ROWOUT=#ROW OUTPUT,
#rowNum_IN=#rownum
SET #HTMLROWS =#HTMLROWS + ''<td>'' + #ROW + ''</td>''
FETCH NEXT FROM col INTO #ColumnName
END
CLOSE col
SET #HTMLROWS=#HTMLROWS + ''</tr>''
END
SET #OUTPUT=''''
IF #maxrows>0
SET #OUTPUT= ''<table ' + #TBL_STYLE + '>'' + #FIELDS + #HTMLROWS + ''</table>''
DEALLOCATE col
'
DECLARE #ParamDefinition nvarchar(max)
SET #ParamDefinition=N'#OUTPUT NVARCHAR(MAX) OUTPUT'
--Execute Dynamic SQL. HTML table is stored in #OUTPUT which is passed back up (as it's
--a parameter to this SP)
EXEC sp_executesql #exec_str,
#ParamDefinition,
#OUTPUT=#OUTPUT OUTPUT
RETURN 1
but when I execute the procedure
DECLARE #HTML NVARCHAR(MAX)
EXEC SpCustomTable2HTML 'Users', #HTML OUTPUT
SELECT #HTML
it keeps returning null.
Any ideas?
This SQL Fiddle DEMO shows your problem. When ALL the columns in ALL rows have values, you get a proper HTML table. When ANY NULLs exist, it turns the entire thing into NULL because
NULL + <any> = NULL
To fix it, simply change line 90 to handle nulls, i.e.
SET #HTMLROWS =#HTMLROWS + '''' + ISNULL(#ROW,'''') + ''''
The fixed SQL Fiddle DEMO
I realise it's been a while (to say the least) since this question was active but I thought I would post a few comments on this thread, as it turned up in a recent search.
Apologies if this (unintentionally) annoys the question asker but I believe the approach being used is both inefficient and difficult to understand - and therefore maintain.
There's no need to copy the database data before using it to generate the HTML table. It's just my humble opinion, but using dynamic SQL to generate dynamic SQL is also counter-intuitive.
Furthermore, database data values that contain HTML tags (or, worse still, malformed HTML tags) need to be escaped, so that they can be rendered correctly. For example, database data such as "value > 10" needs to generate the HTML "<td>value > 10</td>".
The following code addresses all of the above points, by using the built-in FOR XML clause:
CREATE PROCEDURE dbo.spCustomTable2HTML
#TABLENAME nvarchar(500),
#TBL_STYLE nvarchar(1024) = '',
#HDR_STYLE nvarchar(1024) = '',
#OUTPUT nvarchar(MAX) OUTPUT
AS
BEGIN
SET NOCOUNT ON;
SET XACT_ABORT ON;
-- Declare variables
DECLARE #Columns nvarchar(MAX) = '',
#Data nvarchar(MAX),
#SQL nvarchar(MAX);
-- Snapshot columns (to force use of tempdb)
IF OBJECT_ID('tempdb.dbo.##spCustomTable2HTMLColumns') IS NOT NULL
BEGIN
DROP TABLE ##spCustomTable2HTMLColumns;
END
SET #SQL =
'SELECT TOP 0 *
INTO ##spCustomTable2HTMLColumns
FROM ' + #TABLENAME;
EXEC sp_executesql #SQL;
-- Build header row
SET #OUTPUT = (SELECT name AS td
FROM tempdb.sys.columns
WHERE object_id = OBJECT_ID('tempdb.dbo.##spCustomTable2HTMLColumns')
ORDER BY column_id
FOR XML RAW(''), ELEMENTS);
SET #OUTPUT += '</tr>'
-- Build column list
SELECT #Columns += '[' + name + '] AS td,'
FROM tempdb.sys.columns
WHERE object_id = OBJECT_ID('tempdb.dbo.##spCustomTable2HTMLColumns')
ORDER BY column_id;
SET #Columns = LEFT(#Columns, LEN(#Columns) - 1); -- Strip trailing comma
-- Delete columns snapshot
DROP TABLE ##spCustomTable2HTMLColumns;
-- Build data rows
SET #SQL =
'SET #Data = CONVERT(varchar(MAX),
(SELECT ' + #Columns +
' FROM ' + #TABLENAME +
' FOR XML RAW (''tr''), ELEMENTS XSINIL))';
EXEC sp_executesql #SQL, N'#Data NVARCHAR(MAX) OUTPUT', #Data = #Data OUTPUT;
SET #Data = REPLACE(#Data, ' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"', ''); -- Remove XSI namespace
SET #Data = REPLACE(#Data, ' xsi:nil="true"', ''); -- Remove XSI attributes
SET #OUTPUT += #Data;
-- Prefix table/row headers
SET #OUTPUT = REPLACE(#OUTPUT, ' ', ' '); -- Use non-breaking spaces
SET #OUTPUT = REPLACE(#OUTPUT, '</tr>', '</tr>' + CHAR(13) + CHAR(10)); -- Add new line per row (to improve rendering in Microsoft Outlook)
SET #OUTPUT = '<table ' + #TBL_STYLE + '>' +
'<tr ' + #HDR_STYLE + '>' +
#OUTPUT +
'</table>';
END
i would like to alter a stored procedure so i will not suplly the identity column name
INSERT INTO tablName ..... WHERE IDENTITY_Column = 10
can i tell sql server managment studio to just refer to the IDENTITY column so it will find
it by its type which is (at least in my tables a default) autoincremet PK ID type
You haven't really given enough code for us to see what you are trying to do but from the snippet in the question.
WHERE IDENTITY_Column = 10
You can just use
WHERE $IDENTITY = 10
for that (to filter against an identity column without specifying the name).
If you do actually need to lookup the column name then an easier way, avoiding deprecated views is
SELECT name
FROM sys.identity_columns
WHERE object_id = object_id('dbo.YourTable')
found this information by now .
that is the plain and simple version .
declare #tblName sysname = '______'--<== enter a table name
declare #NameOfIDColumn sysname =
(
SELECT Name
FROM syscolumns
WHERE COLUMNPROPERTY( id ,name, 'IsIdentity') = 1 and OBJECT_NAME(id)= #tblName )
select #NameOfIDColumn AS 'result'
you could add this as an option to display last row of a table soretd by its record#
declare #query VARCHAR(100) = 'Select Top 1 * FROM '+ #tblName +' Order BY ' + #IdentColumnName + ' desc' ;
EXEC (#query);
and to play around or even make it as a test page in a .net project
make this one as a stored proc that will outpout a message to a test page .
declare #tblName sysname = '______'--<== enter a table name
declare #IdentColumnName sysname =
(
SELECT Name
FROM syscolumns
WHERE COLUMNPROPERTY( id ,name, 'IsIdentity') = 1 and OBJECT_NAME(id)= #tblName )
declare #result VARCHAR (50) = #tblName + ' Identity Column is ' + #IdentColumnName;
select #result AS 'result'
and with a shorter version of "idntity column search", by Martin Smith
declare #tblName sysname = '______'--<== enter a table name
declare #IdentColumnName sysname =
(SELECT name FROM sys.identity_columns WHERE object_id = object_id(#TableName))
declare #result VARCHAR (50) = #tblName + ' Identity Column is ' + #IdentColumnName;
select #result AS 'result'
this is related to a table copy trick i was trying to pull via stored procedure.
USE [YourDataBaseName]
GO
/****** Object: StoredProcedure [dbo].[Utils_TableRowCopy] Script Date: 10/03/2012 18:26:58 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[Utils_TableRowCopy](
#TableName VARCHAR(50) ,
#RowNumberToCopy INT
)
AS
BEGIN
declare #RowIdentity sysname =
(
SELECT name FROM sys.identity_columns WHERE object_id = object_id(#TableName)
)
DECLARE #columns VARCHAR(5000), #query VARCHAR(8000);
SET #query = '' ;
SELECT #columns =
CASE
WHEN #columns IS NULL THEN column_name
ELSE #columns + ',' + column_name
END
FROM INFORMATION_SCHEMA.COLUMNS
WHERE (
TABLE_NAME = LTRIM(RTRIM(#TableName))
AND
column_name <> LTRIM(RTRIM(#RowIdentity))
);
SET #query = 'INSERT INTO ' + #TableName + ' (' + #columns + ') SELECT ' + #columns + ' FROM ' + #TableName + ' WHERE ' + #RowIdentity + ' = ' + CAST(#RowNumberToCopy AS VARCHAR);
--SELECT SCOPE_IDENTITY();
declare #query2 VARCHAR(100) = ' Select Top 1 * FROM '+ #TableName +' Order BY ' + #RowIdentity + ' desc' ;
EXEC (#query);
EXEC (#query2);
END
Is there a way to create table type in SQL Server 2008 based on scheme of existing table?
CREATE TABLE A (id INT, name VARCHAR(30))
CREATE TYPE type_a AS TABLE.A
Something like that.
No, this kind of composable DML is not yet possible. Microsoft has rejected this suggestion in the past, but with enough votes (e.g. more than 1!) it may get reconsidered in the future:
http://connect.microsoft.com/SQLServer/feedback/details/294130/table-valued-parameters-add-support-for-create-type-type-from-table-table-name-options-syntax-construct
You can use following stored procedure to create a type with same schema existing table may have.
Create PROCEDURE [dbo].[Sp_DefineTypeOutOfTableSchema]
#TableNames NVARCHAR(500)
AS
BEGIN
DECLARE #TableName NVARCHAR(100)
DECLARE #strSQL NVARCHAR(max)
DECLARE #strSQLCol NVARCHAR(1000)
DECLARE #ColName NVARCHAR(100)
DECLARE #ColDataTaype NVARCHAR(50)
DECLARE #ColDefault NVARCHAR(50)
DECLARE #ColIsNulable NVARCHAR(50)
DECLARE #ColCharMaxlen NVARCHAR(50)
DECLARE #ColNumPrec NVARCHAR(50)
DECLARE #ColNumScal NVARCHAR(50)
IF LEN(#TableNames) > 0 SET #TableNames = #TableNames + ','
WHILE LEN(#TableNames) > 0
BEGIN
SELECT #TableName = LTRIM(SUBSTRING(#TableNames, 1, CHARINDEX(',', #TableNames) - 1))
DECLARE schemaCur CURSOR FOR
SELECT COLUMN_NAME,DATA_TYPE,IS_NULLABLE,COLUMN_DEFAULT,CHARACTER_MAXIMUM_LENGTH,NUMERIC_PRECISION,NUMERIC_SCALE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME =#TableName
OPEN schemaCur
SELECT #strSQL=''
FETCH NEXT FROM schemaCur
INTO #ColName,#ColDataTaype,#ColIsNulable,#ColDefault,#ColCharMaxlen,#ColNumPrec,#ColNumScal
WHILE ##FETCH_STATUS = 0
BEGIN
SELECT #strSQLCol=''
SELECT #strSQLCol= '['+#ColName+'] '+'[' + #ColDataTaype +'] '
IF #ColDataTaype='nvarchar' or #ColDataTaype='char' or #ColDataTaype='varchar' or #ColDataTaype='vchar'
BEGIN
SELECT #strSQLCol=#strSQLCol+ '(' + #ColCharMaxlen +') '
END
ELSE IF #ColDataTaype='numeric' or #ColDataTaype='decimal'
BEGIN
SELECT #strSQLCol=#strSQLCol +'(' + #ColNumPrec +',' +#ColNumScal + ') '
END
IF #ColIsNulable='YES'
BEGIN
SELECT #strSQLCol=#strSQLCol+ 'NULL '
END
ELSE
BEGIN
SELECT #strSQLCol=#strSQLCol+ ' NOT NULL '
END
IF #ColDefault IS NOT NULL
BEGIN
SELECT #strSQLCol=#strSQLCol+ ' DEFAULT(' +#ColDefault + '),'
END
ELSE
BEGIN
SELECT #strSQLCol=#strSQLCol+ ' ,'
END
SELECT #strSQL=#strSQL+#strSQLCol
--print #strSQL
FETCH NEXT FROM schemaCur
INTO #ColName,#ColDataTaype,#ColIsNulable,#ColDefault,#ColCharMaxlen,#ColNumPrec,#ColNumScal
END
CLOSE schemaCur
DEALLOCATE schemaCur
--print #strSQL
SELECT #strSQL=left( #strSQL, len(#strSQL)-1)
--print #strSQL
IF EXISTS (SELECT * FROM sys.types WHERE IS_TABLE_TYPE = 1 AND name = 't_' +#TableName)
BEGIN
EXEC('DROP TYPE t_' +#TableName )
END
SELECT #strSQL = 'CREATE TYPE t_' + #TableName + ' AS TABLE (' + #strSQL + ')'
--print #strSQL
EXEC (#strSQL)
SELECT #TableNames = SUBSTRING(#TableNames, CHARINDEX(',', #TableNames) + 1, LEN(#TableNames))
END
END
you can use it like this
Exec Sp_DefineTypeOutOfTableSchema 'Table1name,Table2name'
You could experiment with creating a function that pulled the table definition out of sysobjects, systypes, syscolumns, syscomments, etc., and built a CREATE statement out of it. You'd just have to make sure to grab all of the important pieces (columns, constraints, comments, etc.) from the various sys tables.
Then call it like... EXEC myCREATEtable #template_table_name or some such...