Transact-SQL (T-SQL) is a dialect of SQL used by Microsoft SQL Server and SAP's Sybase.

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Choosing the right algorithm in HashBytes function

We need to create hash value of nvarchar data for comparison purposes. There are multiple hash algorithms available in T-SQL, but which one the best to choose from in this scenario? We want to ensure ...
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2answers
2k views

Transact SQL using WITH in CREATE VIEW

I want to create VIEW using WITH clauses, but really can't find any references on correct syntax. I want smth like this WITH TempTbl AS (SELECT ...) CREATE VIEW SomeView SELECT * FROM TempTbl And ...
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2answers
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How can I get a list of column names and types from a resultset?

Say I get a resultset back from the following query: select * from sys.database_files; For any given resultset, I want to be able to query the column names and types so I can then create tables to ...
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2answers
162 views

Find top by values by percents using range in SQL Server

What will be easier way to group records by range of percents. Here what I try to accomplish Select top percents between 50 and 75 * from myTable order by PKI Here is way I did this but I have ...
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1answer
1k views

SQL Server 2012 is putting [brackets] around Table and Column Names

Is there anyway to turn that off? I'm unable to find anything in options, and they're really a distraction.
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1answer
192 views

Get records not updated in last 30 minutes

I am trying to write a script that will get records that have not updated the table in more than 30 minutes. Example records: DNS_NAME LAST_PERF_TIME esxnu01 2013-12-24 12:10:00.000 esxnu02 ...
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3answers
131 views

Inserting two rows from single row

I have to import users from the usersToImport table into the userContact table. usersToImport contains telephone and e-mail information in a single row for each user, but userContact stores one kind ...
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2answers
3k views

A Script to insert dummy Data in all tables of Database

I wanted a Script that can loop through all tables and their columns in the database and insert dummy data based on column type and size, so that i can start using the database for testing, and ...
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1answer
177 views

How do I delete unique rows from a table with duplicate keys?

I have the following data: road | ID | other column | other column | ------------------+------+---------------+--------------+ MAIN ST | 1 | ... | ...
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3answers
383 views

Select rows after a specific ID

I have the following query, it chooses from a news articles table. Due to multiple sorting factors, I cannot locate the next page of date. The parameter I have is the last ID in the query result set, ...
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3answers
486 views

Running a DELETE stored procedure but finding degradation in performance in WHILE loop as iterations increase

Have a quick general question. I have a table I'm trying to purge a table. I'm deleting using a WHILE loop with WAITFOR DELAY time of 50ms between batches and 2000 records per batch. The real issue is ...
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2answers
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How can I create different sets of sequential values based on another column in a table?

I've got a table that holds two types of notes. Collection Notes and Delivery Notes. They are identical data structures, hence using the same table. CREATE TABLE Notes ( Id int IDENTITY(1,1) NOT ...
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2answers
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CASE ORDER BY with multiple columns, and different sort options

I am attempting to use a T-SQL CASE ORDER BY in a stored procedure where I am passed @OrderBy parameter as a TINYINT. @Orderby = 1 Then Date column should be ASC @Orderby = 2 Then Date column ...
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1answer
412 views

Does T-SQL MOVE actually move the database, or just copy?

I'm a bit confused over the T-SQL command MOVE. I have a statement saying: MOVE N'Prod_Database_Data' TO N'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\Test_Database.mdf' ...
3
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1answer
582 views

Understanding SIX lock in Microsoft SQL-Server

Can somebody explain me how a process can acquire SIX lock on a page? I my deadlock-graph xml file I see that a process running under RC isolation level (executing a select statement at the moment of ...
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3answers
544 views

Conditional WHERE Clause in a Table Valued Function

I have a table valued function CREATE FUNCTION [dbo].[DateRange] ( @StartDate date, @EndDate date, @Location varchar(25), @Device varchar(25) ) ...
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3answers
312 views

Programmatically find indexes that cannot be rebuilt online

I am automating rebuild and reorganise indexes using T-SQL. I run into problems with indexes that cannot be rebuilt online. Primarily this happens because ntext/nvarchar columns are included. Is ...
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1answer
344 views

LIKE character length limitation

The background to this question can be found here. The following part of my stored procedure does not work. Is there a character length limitation for the LIKE clause? t1.ProductList sometimes can be ...
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1answer
128 views

Selecting 'edge' records in a sequence of data

I have a table of items which run sequentially by date with both a start and end for each entry: ID | Start | End ---------------------------------------- 1 | 2012-08-20 00:00 | ...
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2answers
241 views

switch TOP clause between percentage and rows by parameter

For one report I am making query where users suppose have to choice TOP values based on percents or fix amount of rows. I have two ideas Calling two different sub sproc based on passed param. if ...
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2answers
681 views

MS SQL : Use Computed value to Compute other values

I'm having problem with generating results which are computed from data that exists in database. This is the case I have Coupons that can be amount or percent, if percent is 0 then amount is used ...
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1answer
73 views

Mapping of multiple server logins to one database user

This seems to be a stupid question but despite some research I was unable to find any information regarding this only (possibly due to using the wrong terminology). Is it possible to log multiple ...
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2answers
142 views

T-SQL - Enforce Atomic Operations x Locks

I have a database model that works similar to a banking account (one table for operations, and a trigger to update the balance). I'm currently using SQL Server 2008 R2. Table OPERATIONS: VL_CREDIT ...
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1answer
78 views

How to replace “set rowcount”

Currently on SQL Server 2008/R2. I just read here that "set rowcount" is being deprecated in some post 2012 release: http://technet.microsoft.com/en-us/library/ms188774.aspx We have some legacy code ...
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4answers
187 views

How to rollback changes made to the database by a specific user?

In mssql, is it possible to rollback changes made by a specific user to the database? For example if that user ran an update query and did not write begin transaction before, is it possible to revert ...
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2answers
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Grouping Selecting unique values in a single column [duplicate]

Here is my table ID Field1 Field2 Field3 Field5 Field7 357 357 2013-03-07 08:02:02:275 t02 bBCD00103RG 365 365 2013-03-07 08:02:05:307 t02 bR U00103w 374 ...
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411 views

Tool to create a TSQL script from a SQL Server 2008 trace file

Are there any tools available to create an executable tsql script from a SQL Server trace file? Is there an easy manual way?
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1answer
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How to split/explode comma delimited string field into SQL query

I have field id_list='1234,23,56,576,1231,567,122,87876,57553,1216' and I want to use it to search IN this field: SELECT * FROM table1 WHERE id IN (id_list) id is integer id_list is varchar/text ...
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2answers
1k views

difference between UPDLOCK and FOR UPDATE

given the following code: Set conn = CreateObject("ADODB.Connection") Set RS = CreateObject("ADODB.Recordset") conn.BeginTrans ... //This is the line it is about RS.Open "SELECT a,b FROM c FOR ...
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1answer
108 views

Dissecting Joins

Recently I asked a question in dba.stackexchange the question was about data hierarchy in sql and a guy named chris allen answered the question and I really loved it but when I try to understand that ...
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2answers
184 views

can I convert an integer to base-2 without a function

Here's a bit of a challenge. I am working with the table ReportServer.Schedule and there is a column called DaysOfWeek. I may not be using the proper terminology here, but this is an integer from ...
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1answer
82 views

Inserting a 30 million row table from a linked server

I have a large table that needs to be updated on a nightly basis from a linked server. Initially I had simply truncated the table and inserted all of the records but this was taking too long. I'm ...
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2answers
105 views

Multicolumn statistics on large table yielding poor estimations

I have a rather large table (~200 million rows), and although the statistics are up to date using WITH FULLSCAN, is it possible that my histogram (limited to 200 steps) is simply too broad for the ...
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1answer
160 views

Selecting the highest value in a column?

I am dealing with a table that has 3 columns and I need a way to select the record(s) that matches a certain PrntP_PstnGrpID(s) and is the highest ChldLevel ( The PrntP_PstnGrpID could have multiple ...
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1answer
95 views

Relationship with a default value

Firstly, I know my title is somewhat misleading, but I couldn't think of a better title. Here is my current relationship CREATE TABLE Events ( ID INT IDENTITY(1,1) NOT NULL, Name ...
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3answers
489 views

t-sql - combinatorics

I'm trying to find all possible character combinations in a variable length string. For example: '--' would have 2^n = 2^2 = 4 possibilities, 'x-', '-x', 'xx', '--' I think that essentially I need ...
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4answers
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Cannot reproduce client SQL 2008R2 error: subqueries are not allowed

EDIT: My question is not "how do I work around the failure?", my question is "why is the failure occurring?" We have a client that reports error "1046 subqueries are not allowed in this context. Only ...
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1answer
47 views

How is ORDER BY logically Processed

Take this example: SELECT SalesOrderID, CustomerID, SalesPersonID, OrderDate FROM Sales.SalesOrderHeader ORDER BY OrderDate, SalesOrderID DESC OFFSET 0 ROWS FETCH NEXT ...
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2answers
519 views

Identify NON-ANSI joins in SQL Server 2008 R2 on a Database that's in 2000 (80) compatibility mode

We have a very old database running on SQL Server 2008 R2. The database is running in 2000 (80) compatibility mode and has oodles of NON-ANSI joins in stored procedures, views and functions. We need ...
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1answer
310 views

Query Performance Issue

I have this below query which is behaving bit weird . well Weird in the sense that I couldn't find complete explanation for this. Version : Sql Server 2008 R2 Enterprise No fragmentation . ...
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2answers
116 views

When did a specific database come online?

How can I determine when the state of a specific database switched to online? Background: I want to determine how long the database is in use to find out how reliable sys.dm_db_index_usage_stats ...
3
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1answer
47 views

SQL Server 2008 R2: query RECENT locks, NOT current locks

The database had average lock wait time of 30 seconds for a period of about a minute. I didn't run my lock query in time to see what was happening. I can't seem to find anything that shows recent ...
3
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1answer
90 views

Frequent Delete & Insert, impact on performance

In my application, we have very few updates. Most of the data gets deleted and inserted. My question is, how this will impact the performance? We are using SQL Server 2012. Table statistics (will ...
3
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1answer
274 views

Displaying Parent Child Information, With Certain Parent Columns Only Shown Once

For a TSQL report, I have a one-to-many parent-child relationship. I want to report both parent and child relationships in the same report, like so, with the parent columns on the left and child ...
3
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1answer
490 views

New foreign key and merge replication

We are experiencing an issue when creating a new foreign key to an existing table, which is being replicated to another SQL Server 2008. More specifically, we are adding a new foreign key to this ...
3
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1answer
822 views

Script to query multiple instances

SQL Server - What is the best method to run the same query over multiple databases on multiple instances? for example we have many application databases, with the same schema that need to have ...
3
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1answer
46 views

Timestamp on SSIS update on tsql

I have a couple of SSIS packages that copy the content of several tables to another db. One of the columns updated in the process is a timestamp datatype. From what I read this datatype can't be ...
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3answers
900 views

Cannot rebuild index, but there's no reason why not?

I've created a process whereby I am able to only rebuild indexes that need rebuilding(the process takes an hour and a half if I rebuild them all), and while it works beautifully, it gets stuck on one ...
3
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1answer
457 views

DENY EXECUTE on one schema object hides other objects in same schema

I have five stored procedures in a schema [XTR], the users are all in one AD group [AD\Users] and have db_datareader and public assigned to them. On one of the stored procedures I don't want to give ...
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0answers
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Mathematical method for spotting irregularity in numbers flow

I am trying to build an engine which is going to predict orders for items inside shop. Three main variables are: Time-dates (x-axe etc 1.1.2013,1.2.2013 etc I do calculation one per day) Available ...