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

learn more… | top users | synonyms (2)

3
votes
2answers
4k views

SQL Query too slow on SUM function

I've a table with around 32 million rows having clustered unique index on CountryID,RetailerID,ProductID,DateID,EventID,TypeID and query is SELECT f.RetailerID , TypeID ...
1
vote
1answer
610 views

Selecting from an excel spreadsheet into SQL Server table

This question has been asked before but I tried giving full admin rights to the SQL Server user on C:\temp\ folder location (I am using Windows authentication into SQL Server Express). So for the ...
1
vote
3answers
4k views

SQL Server Database grew too much too fast

I have an issue with one database. The issue is as follows: The database is being running on SQL Server 2000 Standard for the last 6 years in Full Recovery mode. In the beginning of this summer the ...
0
votes
1answer
8k views

How to create an Sql table from SELECT with a multiple row DISTINCT constraint?

I want to create a table from a SELECT statement based on a multiple row DISTINCT, but PostgreSQL does not allow me to do it. I need to create a table where the elements were previously selected from ...
2
votes
1answer
204 views

How can I connect to a database after its disk has come back online?

I have problems with database after reconnecting a hard disk: .Net application works with database. Disconnect hard disk with physical files. Make any request to the database (of course we will have ...
2
votes
1answer
65 views

Make database use more than one file

I have to following problem: since my database runs out of memory in a few days, I am looking for a way how to make the database use more than one file. I would like to store upcoming data in another ...
1
vote
3answers
15k views

How to solve ORA-011033: ORACLE initialization or shutdown in progress

I have followed link to solve the problem. When it is giving ORA-00600: internal error code, arguments: [kcratr1_lostwrt] then I am using: SQL> startup mount the above line should return ...
8
votes
3answers
6k views

Does disconnecting the network stop a query?

I recently executed an update query against 100,000 records. I realized I'd made a mistake while the query was running and quickly unplugged the network cable. Does the update query stop ...
4
votes
3answers
6k 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, ...
1
vote
1answer
820 views

postgres+JDBC: fire trigger with non autocommit transaction

i have a jdbc client that make an two INSERT query on database whitout autocommit, and a trigger on database that fires when a insertion is done on a certain table public foo() throws MyException { ...
6
votes
2answers
1k views

SQL Server Tuning a table for massive inserts

I'm trying to solve a performance issue and I need advice. I have a table, which about twice a day has a massive surge of inserts coming in, and exactly at the same time everybody is trying to read ...
0
votes
1answer
381 views

Query to get reposts from people the user is following

I have a table posts where all the posts by users are stored, the structure of this table is as follows. | post_id | post_user | post_content | post_date | The users table is as follows. | user_id ...
5
votes
5answers
7k views

How to select from a table without including repeated column values?

In a previous question How to merge data sets without including redundant rows? I asked about filtering redundant historical data during import, but @DavidSpillett correctly replied that I couldn't do ...
1
vote
1answer
746 views

Using like over charindex to search for pattern

We where using charindex to search for a string as shown below SELECT * FROM tablename WHERE ( Charindex('47a%$.abc',CAST(columnname AS VARCHAR(MAX)))>0 ) I am planning to replace charindex with ...
1
vote
1answer
990 views

When MySQL table gets too large

I have a really large MySQL table counting more than 12 billion rows at the moment (table scheme: InnoDB). From time to time the problems get more and more. The biggest problem is that altering the ...
1
vote
1answer
393 views

Creating a table with parent_id from a flat table

I have a flat table (id, city, county, state), Example (1,'Beckingen', 'Merzig-Wadern', 'Saarland') A city belongs to a county. A county belongs to a state. First my attempt was to divide the ...
3
votes
2answers
511 views

Adding an index to a system catalog in Postgres

I'm having a situation very similar to the one described here: I've got a SaaS situation where I'm using 1000+ schemas in a single database (each schema contains the same tables, just different ...
6
votes
3answers
5k views

In Microsoft SQL Server 2008, syntax generates the error “The Parallel Data Warehouse (PDW) features are not enabled.”

I have the following virtual column generated from an aggregate over a sorted partition, MIN(picture_id) OVER ( PARTITION BY [360_set] ORDER BY picture_id ASC ) However, when I execute that, I get ...
1
vote
1answer
130 views

Number of times a table is read, written to and updated

Is there a way I can find out the number of times a table is read, updated, added to or has had rows deleted during a trace? I am creating the trace in SQL using sp_trace_setstatus, not using the Sql ...
5
votes
3answers
13k views

Return multiple rows from matching on multiple CASE matches?

I want to add a column to my query which will specify one or more categories a row matches. I want to take this: +--------------+---------------+ Row | Product | Quantity_Sold | +--------...
4
votes
1answer
4k views

PostgreSQL: How to list all stored functions that access specific table

Introduction: PostgreSQL database with several hundred of stored functions, including obsolete, not used etc. Problem I need to find out all the stored functions that have any relationship to the ...
0
votes
1answer
110 views

Different time in different sessions

I am connecting to same db from 2 different machines using SQL Developer and querying a table which stores timestamp. But to my surpise the time value returned by query has a gap of one hour on ...
0
votes
1answer
266 views

Suitable database software for small business [closed]

First of all, I apologise if this is in the wrong area. I'm looking for a suitable database program for a small engineering business, which needs to log various jobs. Currently, we're just using an ...
4
votes
3answers
187 views

Expanding a dataset based on a weight field

I have a table that contains records in an un-expanded form. Each record has an associated integer weight that essentially informs us how many times the record should be replicated in order to get the ...
-3
votes
1answer
483 views

Query sql-server db and insert results into PostgreSQL

I have a query that returns data from sql-server and I need to be able to put the results into PostgreSQL. I'm using C# for the task.
20
votes
2answers
8k views

LIKE uses index, CHARINDEX does not?

This question is related to my old question. The below query was taking 10 to 15 seconds to execute: SELECT [customer].[Customer name],[customer].[Sl_No],[customer].[Id] FROM [company].dbo.[customer] ...
1
vote
2answers
131k views

Select which has max date or latest date

Here are two tables. SCHOOL_STAFF SCHOOL_CODE + STAFF_TYPE_NAME + LAST_UPDATE_DATE_TIME + PERSON_ID ================================================================= ABE Principal ...
0
votes
3answers
310 views

Do database engines update when the updated value is the same? [closed]

Suppose I am running multiple column update on one row. Does the database engine physically write new data to the database if some of the columns contain the same values as existed previously in the ...
0
votes
2answers
336 views

Dealing with data stored as arrays in a MySQL DB

So I know storing arrays in a DB field is wrong and would never do it myself, however a 3rd party plugin my company is using stores data in an array and I was wondering if you could help me try to ...
1
vote
0answers
178 views

Importing large .sql file stops before even midway and starts deleting

Okay so i'm trying to import my minecraft servers .sql file into database and after first 1GB of importing data it stops without error and starts deleting what already has been imported any ideas? ...
1
vote
1answer
57 views

Altering strings while selecting them

I'm working in SQL Server 2008, I have a varchar(255) column in my table, I want to select out all of the strings which contain the ':' character, and select the first part of the string before (but ...
2
votes
1answer
4k views

Query taking non-consistent time to execute [closed]

I have a query which takes large time to execute sometimes.When i checked the speed it was taking 15 seconds.But actually it should run faster than that.When i again checked the query it again ...
1
vote
1answer
34 views

Plan for storing transactions in an easily retrievable manner, indefinitely

I've got a large (many columns) MySQL database table (InnoDB) that has a fairly high number of INSERTs (~500/day). Think of the records as financial transactions. Clients need to be able to view these ...
0
votes
1answer
3k views

Query taking too long to execute

My query takes a lot of time, 22 seconds and above. After 22 seconds, we get more than 900 000 records. We have created indexes on the table which are used in the query: select * from ContactMaster ...
1
vote
0answers
324 views

Producing an outstanding fees report in MySQL

This question is about a MySQL stored procedure to select the records from two tables by joining them and also do some arithmetic operations in that. I have 3 tables for fees one is to store fee ...
-1
votes
1answer
106 views

Disconnect many persistent queries [closed]

By accident, I issued in the region of 500,000 individual queries against my database. It's been running for 6 hours now. When I restart the server, they continue to connect and run. I need them to ...
-1
votes
1answer
5k views

'ambiguous column name' error refers to database, table, and column [closed]

sqlite3 gives an 'ambiguous column name' error with the query below. The error itself references what seems to be about as an unambiguous column name as one can imagine, identifying the database as '...
4
votes
2answers
11k views

Query (duration) different between data value change

I am trying to write a query that would get me the duration of a status in a table. This query needs to work in SQL Server 2008. Say I have the following table: Key Value RecordDate 1 1 2012-...
5
votes
2answers
27k views

Could not allocate a new page for database because of insufficient disk space

Using the SQL Server Import and Export Wizard, I get this error: Error 0xc0202009: Data Flow Task 1: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005. ...
17
votes
1answer
33k views

CREATE INDEX vs ALTER TABLE ADD INDEX - MySQLism, or SQL Standard?

Just came across a weird issue, whereby depending on how I create an index, an index name is required. http://dev.mysql.com/doc/refman/5.5/en/create-index.html http://dev.mysql.com/doc/refman/5.5/en/...
-4
votes
1answer
6k views

Can I create a view against a table on another instance? [closed]

I need to query a table from another SQL Server on a different server but same domain, but I am not sure how I will be able to do it. I tried the solution in this answer but it doesn't work for me as ...
4
votes
2answers
2k views

Pulling autogrowth events by file name from default trace

I use below query to get auto-growth event occurred to databases in a sql server. DECLARE @trcfilename VARCHAR(1000); SELECT @trcfilename = path FROM sys.traces WHERE is_default = 1 SELECT COUNT(*)as ...
1
vote
2answers
805 views

Stored Procedure in MySQL

I am new to MySQL Stored Procedure, in my first attempt I got the following issues, Stored Procedure: Delimiter $$ create procedure accountstatus ( IN inmode varchar(27), IN ...
9
votes
2answers
738 views

function hangs with null case operation

I created a function that accepts a start and end date, with the end date being optional. I then wrote a CASE in the filter to use the start date if no end date is passed. CASE WHEN @dateEnd IS NULL ...
3
votes
1answer
2k views

Does existing msrepl_tran_version column need to be removed when re-creating replication?

What is the process for removing a replication and then re-creating the replication. I know the process to set up replication. However, If i wanted to take a publisher database copy it and restore it ...
1
vote
0answers
82 views

Rows do not match Subscriber and Publisher

I have an transactional replication setup with updateable subscription that is utilized by an Application. When I insert a project into the application, the msrepl_tran_version is different on the ...
2
votes
3answers
1k views

SQL Server data extract with limited performance impact

Background: I have a SQL Server 2008 Enterprise Edition database containing three tables. The tables contain ~3 million, ~14 million, ~14.5 million rows respectively. Problem: I need to do a data ...
23
votes
3answers
114k views

How do I insert a row which contains a foreign key?

Using PostgreSQL v9.1. I have the following tables: CREATE TABLE foo ( id BIGSERIAL NOT NULL UNIQUE PRIMARY KEY, type VARCHAR(60) NOT NULL UNIQUE ); CREATE TABLE bar ( id BIGSERIAL ...
1
vote
1answer
5k views

Get top most parent by nth child id?

Now there is a question we commonly use this technique to maintain the parent child relation i.e we store all the entities in one tables with a parent_id column and all top most parents have 0 in the ...
0
votes
1answer
1k views

Export just rows modified in last month (date defined by user)

I'm asking if it's possible in MySQL to export just rows modified in a period of time for example in the past month, if it is possible, how?