Structured Query Language (SQL). For questions about the language, not Microsoft SQL Server (tag sql-server).

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16
votes
2answers
922 views

Decision criteria on when to use a non-dbo schema vs a new Database

I'm mostly an application developer but find myself having to do all the up-front database work for my current project (btw... its MS SQL Server 2008). As a first decision, I'm trying to figure out ...
10
votes
6answers
11k views

SQL Query Formatter [closed]

Are there any (Linux based) SQL Query Formatting programs/plugins/extensions? I use PostgreSQL and MySQL but other DB's are welcome as well. I can use a VM to test with but would prefer a Linux (...
4
votes
1answer
520 views

sp_sqlagent_get_perf_counters SQL Server 2005 running every 20 seconds

A little background info: We are running SQL Server 2005 SP2 on a server with Microsoft Windows Server 2003 SP2. When I run profiler I notice that EXECUTE msdb.dbo.sp_sqlagent_get_perf_counters is ...
8
votes
2answers
8k views

How to retrieve foreign key constraints data

I'm looking for a query allowing to retrieve foreign key infos (each line: referrencing table & field, referrenced table & field) of an entire schema. I've found this, but does not gives all ...
5
votes
3answers
8k views

Disable trigger for just one table

Is it possible to disable a trigger momentarily but for just one table. For example I have table, TableA with an on insert, update and delete trigger. I also have a table B with the same triggers but ...
13
votes
2answers
14k views

Order by column should have index or not?

I have added indexes to table which are used for searching result. I am showing results by ASC or DESC order. So that column should have index or not? I have 2 more indexes on that table. How ...
2
votes
2answers
325 views

Sudden reduction in full backup size

I recently repaired a single corrupt page in one of the tables in a 70gb database. I had a backup which included the data contained in the page so I went about using DBCC CHECKDB with ...
1
vote
2answers
1k views

Backup of Postgres database

I want to create a backup of my database in Postgres. I'm using pgAdmin. on my database I have clicked right button of mouse after that I've selected the "Create a backup of database" After that I'...
2
votes
1answer
155 views

strange optimization of query results in phantom value conversions

-- DB collation is German_PhoneBook_BIN CREATE TABLE [dbo].[partition_tbl]( [tbl_name] [varchar](255) NOT NULL, ) ON [PRIMARY] INSERT INTO partition_tbl VALUES ('some_table_{num}') INSERT INTO ...
2
votes
2answers
62 views

Size of the database and table while inserting and deleting in sql server 2005

I have created a table : Table1. Inserted 100 thousand rows and deleted. I did the same around 100 times ( inserting and deleting). Will it cause of increasing the database and table size every time? (...
7
votes
3answers
2k views

Oracle's left join and where clauses errors

CREATE TABLE "ATABLE1" ( "COLUMN1" VARCHAR2(20 BYTE), "COLUMN2" VARCHAR2(20 BYTE) ); CREATE TABLE "ATABLE2" ( "COLUMN1" VARCHAR2(20 BYTE), "COLUMN2" VARCHAR2(20 BYTE) ); ...
1
vote
0answers
75 views

What is the best way to find object dependancies in SQL Server [duplicate]

Possible Duplicate: How can I track database dependencies? How can I know which store procedure or trigger is using a table on SQL Server 2008 R2? I have been using the following SQL on SQL ...
1
vote
1answer
132 views

Can a Database request automatically remove itself from the queue after a delay?

I'm using table locking in my Oracle database. I have a small program with a function that locks my table, does some things and unlocks it again. If many instances are run and requests are made ...
0
votes
2answers
3k views

Access ODBC reserved error 7711

I have user who is trying to access some tables from our Microsoft SQL Server 2008 R2 system (which very recently got moved to a brand new hardware/software stack) using Access 2007 via an ODBC ...
0
votes
1answer
290 views

FTS - Index rebuild causing CPU issues (SQL Server 2008 R2)

I am encountering some critical issues on SQL Server 2008 in a production environment; We have a database that contains a FTS index; we also have a maintenance job that rebuilds the FTS index and ...
1
vote
3answers
652 views

Should I split a single table with an AUTO_INCREMENT PRIMARY KEY into two tables that can be joined on that PRIMARY KEY?

I have a table that has 46 fields with an AUTO_INCREMENT PRIMARY KEY. It's hard to look at a table that has this many columns, so I frequently use a SELECT statement to look at 34 of the fields that ...
6
votes
1answer
1k views

Loyalty reward - record for every day of a week

I have a table that contains every login a user makes. I am trying to make a loyalty system that rewards users if they've logged in every day for a week. So, the real question, how do I get every ...
8
votes
4answers
44k views

Call a stored procedure from a trigger

I have created a stored procedure in mysql using the following syntax. DROP PROCEDURE IF EXISTS `sp-set_comment_count`; DELIMITER $$ CREATE PROCEDURE `sp_set-comment_count` (IN _id INT) BEGIN -- ...
4
votes
1answer
303 views

DB Master Key Encrypted By *Correct* Service Master Key?

My client has frequently run process where we move databases from a prod environment to lower environments (refresh QA with prod database, etc). These DBs have database master keys on them. We have ...
11
votes
1answer
6k views

Deadlock error isn't returning the deadlock SQL

Transaction (Process ID) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. I am getting this error randomly when one of my ...
2
votes
1answer
395 views

Rewriting a query

I have a database with the following structure (star schema): facttable: pros integer mena integer me integer vahet double precision slutttp timestamp without time zone Structure of each ...
6
votes
3answers
3k views

Why performance degradation with query hint FIRST_ROWS(1000)? [closed]

I have a query with user supplied arguments that can produce a very high amount of rows depending on the user's input. In case the user supplies very unselective arguments, the query takes a lot of ...
2
votes
1answer
811 views

SQL Server 2008 r2: What events/queries hit tempdb

We had a slowdown on a db server this morning. Checking the logs, the only thing that happened during the 2-minute slowdown worth noting was an object being created and deleted in tempdb over the span ...
2
votes
3answers
2k views

View Design Best Practices

When designing a view, would it be best to retrieve the ID fields where FK relationships exist between the joined tables the desired description field obtained through the FK id relationship both? ...
2
votes
2answers
253 views

strange behavior with Turkish language setting

I have database with Collation Arabic_CI_AS when I have windows with English settings I can do select Column from Table where Column= 'A' and can do select column from table where column= 'A' ...
4
votes
1answer
4k views

Postgres PgAdmin III Query Builder crash

I've been using Postgres and pgAdmin III for some years, but this morning I had a very BIG BIG problem. I'm using pgAdmin III 9.0 on Windows Xp operating system, on my laptop Dell Latitude E4300. ...
2
votes
1answer
1k views

Delete rows in a table that has multiple FKs

I need to delete all the rows in the ContentData table that have the word 'DV95' in the htmldata column. Here is what I am using: BEGIN TRANSACTION DELETE Contentdata FROM Contentlinks INNER JOIN ...
3
votes
2answers
5k views

Why Sqlcode 100 does not come with exception

I have following query in a PL\SQL procedure on Oracle 10.2: This is the code LOOP BEGIN SELECT a.poid_id0 into v_acc_account_poidid0 FROM account_t a WHERE a.poid_id0=i_acct_id0 ...
4
votes
4answers
453 views

DB Optimization with 2 to the power of N - Approach clarification

This is a request for analysis and better performance approaches, one of my colleague has come up with an approach in optimizing the DB and it looks very impressive too. Can someone please let us know ...
1
vote
3answers
3k views

Inventory Database Design Issue

G'day, I own a jewellery retail store alongside an online store, and am in the midst of building a completely custom system to track all of my inventory. I also have a number of stockists (other ...
4
votes
1answer
463 views

database design issue

This is my first time on this beautiful content rich site. I have a sql server 2008 database, but am not too experienced with good relational database design. My project is this: I have a school ...
6
votes
1answer
366 views

in postgres, can one optimize a table across partitions?

in a database with many companies, segregating them using schema and search_path almost all access comes at the company level, that is, limited to a single schema. some data-warehouse and accounting ...
3
votes
2answers
5k views

“on duplicate key update” all the non-key fields mentioned in the insert

How can I update the field values mentioned in the insert portion without listing them again in the on duplicate key update portion? insert into tablename set keyname = 'keyvalue', fieldname = '...
4
votes
2answers
4k views

MySql - How can I speed up this query

I have the following tables: CREATE TABLE `users` ( `id` int(11) NOT NULL AUTO_INCREMENT, `first_name` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL, `last_name` varchar(255) COLLATE ...
2
votes
1answer
323 views

What's wrong with this update RANK query?

It was updated only the first time I ran it, after that the users_tbl_rank stays the same. $sql = "SET @r = 0; UPDATE users SET users_tbl_rank = @r := (@r + 1) ORDER BY users_tbl_points DESC"; In ...
0
votes
1answer
468 views

which DBMS should i go for? [closed]

I am interested in learning a DBMS. As a beginner which DBMS should i go for ? I know few DBMS by name like Oracle,Sql Server,My Sql . How are these DBMS different from each other ? As a beginner ...
0
votes
1answer
65 views

Oracle: calling udf that modifies the data. How to do it right?

Say I have a function : create or replace function test_function return integer as PRAGMA AUTONOMOUS_TRANSACTION; t_test integer :=1; begin update test1 set id = id+1 ; // table test1 has, for ...
5
votes
1answer
1k views

Nested queries or temp (#) tables in SQL Server

I have written a web application which aggregates and presents data from a SQL Server. The data involved is large, and there is a lot of aggregation involved. Currently, under advice from an 'expert' ...
2
votes
1answer
2k views

How to make it impossible for a postgres user to delete databases?

What yould be the sql statement (that the user postgres will execute) so it will be impossible for the postgres user user1 to delete (drop) databases? Or can I add a rule into some config file?
5
votes
1answer
502 views

Replication of database used by two programs

I have a peer to peer transactional replication set between two identical databases, each one of the databases is being used by a different program on two different servers. Since we implemented the ...
6
votes
7answers
948 views

Database table and NULLs

I know that there have been many opinions/sides concerning NULL values in a database. I have not understood though what is the best practice for this. I.e. if I have a relational table with an ...
1
vote
2answers
453 views

SQL Server database mirroring on different servers [closed]

I have two different Windows Sever 2008R2 instance located at different places such as db1 and db2. I need to make db2 as mirror server of db1 i.e. all the database on db1 will have a mirror copy on ...
4
votes
2answers
2k views

How to select a subset of data from a large ER model?

I have a quite large ER model in my database and lots of data. Now I would like to take a subset of this data into a different database for testing purposes. The problem is how to get a subset from ...
1
vote
1answer
812 views

Insert bulk Parent and Children rows using SQL Query

We receive bulk data from our customers in a spread sheet. I loaded them in a temporary table as of now. I tried to normalize the data and create a parent table and each parent to have 4 or 5 child ...
2
votes
2answers
111 views

Retrieve job Details in SQL Server 2005

How do I retrieve information about a SQL Server Agent job scheduled against databases on SQL server 2005?
3
votes
5answers
10k views

Copying Oracle 11g express Database from one server to another

Basically, I am a MS-SQL developer,and relatively new to Oracle. Even after great deal of research, I was unable to find any way of copying entire database from one server instance to another. In ...
4
votes
1answer
2k views

How to use the METHOD_OPT parameter in DBMS_STATS.gather_table_stats

Hi there I was just wondering what would be the difference between these 2 METHOD_OPT parameter settings: FOR COLUMNS SIZE 5 some_column and FOR COLUMNS some_column SIZE 5 both will create a ...