DO NOT USE this for questions targeting Microsoft SQL Server, use the tag sql-server instead. "SQL" is an acronym for "Structured Query Language", it is used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. ...

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122 views

Why is this query creating 300+ temporary tables in Mysql?

SHOW global STATUS LIKE '%tmp%'; set @UID = 132; set @param2 = 'cde'; set @param3 = 20130331; set @param4 = 'C'; select p.id, p.column44, p.column42, ue.column35, u.id, p.column43, p.column45, ...
0
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1answer
94 views

Hash in SQL query

I saw few sql queries with ### appended before and after column name in where clause like `select a from emp where a.###id### = 1` What is significance of these hashes?
2
votes
1answer
433 views

SQL Application Role access-control

I have been researching the use of Application Roles within Microsoft SQL Server and was wondering if there is a way to limit a user to only be able to set specific application roles. As I understand, ...
0
votes
0answers
87 views

Huge sizes Replication Tables in Sql Server db, how to deal with? [closed]

I've a sql server database that is configured to work with old software, i've no details about the software, but i know that DB uses replication. the DB size dramatically increases. When i ...
0
votes
1answer
397 views

Why is CDC capture failing due to a missing dbo principal

I am having a problem running the CDC change capture job against some of my test databases. The error message I'm getting is the following: Executed as user: NT AUTHORITY\NETWORK SERVICE. Cannot ...
1
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1answer
572 views

Moving model database

I have moved the model database by using following method For each file to be moved, run the following statement. ALTER DATABASE model MODIFY FILE ( NAME = modeldev , FILENAME = ...
0
votes
2answers
7k views

Oracle Undo tablespace users

Can anybody help me on "what all users are using the undo tablespace and how much" in oracle database 11g r2. any pointers would be much appreciated.
1
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2answers
2k views

Get most recent 100 records from the database

I am using SQL Server 2008, we have one database which contains 150 tables. We have introduced systimestamp DATETIME column in every tables. We do update this column with current timestamp whenever ...
-1
votes
1answer
50 views

what kind of owner to defined when creating Sql server DB for web site? [closed]

what kind of owner to defined when creating Sql server DB for web site ? I am trying to create db and i need to select owner. my db will serve aspnet web site and I wonder witch owner will be safe to ...
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votes
2answers
5k views

Get Hierarchial Data in Self-Referencing Table (Parents , Childs) [closed]

In the following Fiddle, sqlfiddle I will pass a sno and I need all the parents of that sno in a table. And all the children of that sno in another table Please refer to this question. Since ...
4
votes
1answer
4k views

Moving MSDB database

When I am trying to move msdb database from it's default location (C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA) to another drive(E:). After moving the database I am getting ...
2
votes
0answers
395 views

Transform XPath map into XML document using relational data [closed]

Background Most modern databases have XML functions that can be used to extract data in an XML format. I want to avoid the task of manually calling XML functions to extract the data. This problem ...
4
votes
2answers
17k views

How to JOIN two table to get missing rows in the second table

In a simple voting system as CREATE TABLE elections ( election_id int(11) NOT NULL AUTO_INCREMENT, title varchar(255), CREATE TABLE votes ( election_id int(11), user_id int(11), FOREIGN KEYs for ...
0
votes
2answers
6k views

Multiple Aliases in an SQL Query

Would it be possible to give a table in MySQL query multiple aliases? If so how would I do this?
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votes
2answers
100 views

Combine two SQL statements to a single statement [closed]

My question is related to SQL. I need to pull values from two different tables. I am not successful in doing that. I am able to join the two tables with only a single condition but not many values ...
3
votes
0answers
166 views

merge replication too big

I have multiple handhelds which sync their data via merge replication. from time to time, new core data is imported on the server-database. for some reasons I keep the old data in the databse and set ...
2
votes
1answer
2k views

Sybase SQL - Truncation error occurred. Command has been aborted and find CACHE QUALITY

Need help with below code, as it fails with truncation error Truncation error occurred. Command has been aborted. create table monCacheQuality ( ServerName sysname ...
3
votes
1answer
632 views

Convert SQL Server UPDATE Statement for Use in Oracle

I can not get this UPDATE statement to work in an Oracle environment. It was written for SQL server. I am looking for some guidance on how to convert it. UPDATE SOB SET COA = CASE ...
1
vote
2answers
596 views

Exploring and optimizing SQL performance of your system (PostgreSQL and Hibernate)?

Imagine you have inherited some project with extensive usage of SQL queries. Let us assume that Hibernate is used as ORM and PostgreSQL as database, but thats not the point. A question is: could ...
3
votes
2answers
458 views

Find all the SP's where a particular column is not updated

I want to find stored procedures where a particular column is not updated. As an example SP1: BEGIN UPDATE YourTable SET Foo = @Foo, Bar = @Bar WHERE Id = @Id ...
4
votes
2answers
3k views

SSIS Data Flow Task Excel to SQL table NULL value will not work for small INT datatype

I have a package that imports excel data into a SQL table. One of the columns in the table is of "smallint" data type and it allows for nulls. The excel file column that has the data that is suppose ...
0
votes
1answer
145 views

Comparing two tables for a UUID change and fix it

I have two tables which I'm trying to reconcile the differences of in postgresql. Table A is old and needs updating. Table B is an updated, schema identical version of Table A which I have the data ...
-1
votes
2answers
2k views

Select query having count and variable

I have a table like the one below. I need to form a select query. I'm going to pass a RefID like SELECT SNo FROM Register WHERE RefID = 1 And beside the SNo in the Statement, I need to have ...
16
votes
7answers
5k views

Why should an application not use the sa account

My first question ever, please be gentle. I understand that the sa account enables complete control over a SQL Server and all the databases, users, permissions etc. I have an absolute belief that ...
0
votes
1answer
983 views

Set field values to newly imported rows in PostgreSQL table with existing data

I have a PostgreSQL table with existing data, and needs to import all the rows in a CSV file into that table. I am using pgadmin3's Import tool to do the import. Question: For the newly imported ...
5
votes
1answer
522 views

Unexpected Table Scan with Parameterized LIKE

I'm experiencing an unexpected table scan on SQL Server 2005 against a heap table when parameterizing a LIKE statement... but when the same value as the variable is hard-coded, the expected Index Seek ...
1
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2answers
156 views

Handling expiration in a course registration or ticketing system

I want to restructure the database for a web application I inherited for handling summer camp registrations, but my question is relevant to any event registration or ticketing system. My question is ...
4
votes
1answer
19k views

Find out number of active locks on a table

I was wondering if there is a way to find out the number of active locks held on a table in SQL Server?
3
votes
1answer
433 views

sql server partitioned view execution plan questions

I have created a partitioned view for 3 tables tb_sales2010,tb_sales2011,tb_sales2012 using check constraint (respectivly for each table) datepart(year,[Date])=(2010) datepart(year,[Date])=(2011) ...
0
votes
2answers
2k views

Estimated Execution Plan SQL Server Sort?

I'm running a query and its taking a age to execute, looking at the execution plan I can see that 51% of the cost is in the SORT? when in the actual query i am not ORDERING BY anything. Anyone got ...
1
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1answer
112 views

Big jump in search time for Postgres Index query for results with high selectivity

I am doing some performance comparison of databases and lucene for full-text searching. So I use Postgres to create an Index for the data to search: CREATE INDEX bodies_index ON bodies USING gin ...
2
votes
1answer
2k views

Limiting number of results in a Partition using OVER(PARTITION BY)

In the following query, why is it that we have to limit the results returned from each Partition by using the clause WHERE foo.row_num < 3 outside of the subquery foo but not from within the ...
1
vote
1answer
62 views

Retrieving Alternating Values

I have a column with two values in my database, I want to retrieve the two values alternately, for example I have: name itemcode ---------- A 1 B 2 C 2 D 2 E 1 F ...
5
votes
2answers
833 views

Recreate Indexes on 1 billion record table

I have a table with over 1 billion records and it has 6 indexes (including Clustered index (ID)). I need to partition this table on a new Clustered index with date column. I have just enough space ...
3
votes
1answer
2k views

Azure SQL Administrator Can't Access Master Database

I created an SQL server and database. I can log in to the database manage page with my administrator account, and manage the database I created, but when I try to look at the master database, it says: ...
1
vote
1answer
4k views

How to use array variable in query in PostgreSQL

Create table t1 ( xcheck varchar[], name text ); CREATE OR REPLACE FUNCTION fn_acgroup(xch varchar[]) RETURNS record AS DECLARE xrc as record; execute 'select name from t1 where xcheck @> ...
3
votes
1answer
937 views

Automatic database file creation based on database file size in SQL Server 2008 R2

Now i am using SQL Server 2008 R2 database for data logging. The name of the database profile is MASTERDB. That profile has one data file called MASTERDB.mdf and one log file called MASTERDB_log.ldf. ...
0
votes
1answer
286 views

Extracting Multiple Values from Single Field

I'm an SQL beginner and I'm having trouble searching correctly for the answer to this question, although I'm sure that it's been asked before. I have an column in an SQL table that looks like this: ...
0
votes
2answers
492 views

Missing data after attaching .mdf file

Recently, one of my customers had a server crash. Unfortunately, the 3th party who was responsible for the backup was 'forgotten' to schedule a backup of the DB (I know, I should have notice that). ...
0
votes
1answer
135 views

Advise On SQL Server Data Replication

We have a huge enterprise system, with geographically seperated SQL servers. We have some requirements related with data replication between these servers. We have considered the Sync Framework ...
2
votes
2answers
2k views

How does ORDER BY really work? [duplicate]

I have one question that confusing me. By logical query processing, the SELECT clause comes before the ORDER BY clause, and in theory, every step in a query creates a virtual table. So, how is it ...
2
votes
1answer
62 views

What is the algorithmic complexity of a PosgtreSQL greater than or lesser than index query (compared to equality)?

Assuming there is an index idx_int on an int_col column, what is the algorithmic complexity of a query like this? SELECT id FROM table WHERE table.int_col > 1; I'm specifically interested in ...
3
votes
1answer
5k views

Oracle insert through dblink performance issue

I'm trying to do an insert as select to a table via dblink. The query looks like this: Insert into MARS_SUPERVISORS_PUB@EDHPUB select {...} from edhper a, edhper b where ...
0
votes
1answer
3k views

ORA-01435: user does not exist

I am trying to run the SQL queries coded on my friend's laptop onto mine. I have imported the .sql file into SQL developer and I'm trying to run it.However, I keep getting the error: 01435. 00000 - ...
0
votes
1answer
456 views

optimize big sql query

My query has to return a statistics for example for march containing productname and price and its sidedishes (1:n relation) with the right price of each sidedish and the right tax for each sidedish ...
2
votes
1answer
1k views

How to make postgresql SUM to be more accurate on large amount of floating point data?

I'm trying to SUM 8 million floating point (REAL) values with simple query like this: SELECT SUM(metric) FROM metrics; However, it returns very inaccurate result. It should return 137,586.77, but ...
2
votes
3answers
541 views

How can I improve my table design for different types of an entity?

Consider an accounting system as an example. I have an Entity called Client. Client can be of different types, with different fields applicable to different types. I consider creating separate tables ...
3
votes
2answers
4k views

Identifying which values do NOT match a table row

I would like to be able to easily check which unique identifiers do not exist in a table, of those supplied in a query. To better explain, here's what I would do now, to check which IDs of the list ...
2
votes
2answers
2k views

Postgres RIGHT JOIN with custom array

I'm using Postgres 9.1 and want to get a result with some blanks where there is no data. My query looks like the following: SELECT institution_id FROM ... WHERE institution_id IN (1, 3, 4, 5, 7, 9) ...
1
vote
1answer
76 views

Merge multiple “is exists” queries into one statement

I'm trying to figure out how to check if multiple rows exist in multiple tables in one statement. Given the following tables: table table_one ======== id 'a' 'b' 'c' table table_two ======== ...