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

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SQL Server Profiler

I had run a SQL trace on SQL server 2008 r2 and had originally saved it to the table format. This table now resides in the database and I was wondering could I export the contents of the table to a ...
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I need to find the “rank” in a sub-set of entries

I am currently working on some sort of a highscore list. But values displayed are individual for each user, ie. limited by constraints. One constraint that I am currently working on is "being part of ...
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Generally unsolvable problem? How to ORDER BY aggregated columns GROUPED BY many possible columns very fast?

Is there general solution or some best practises or at least some vague hint, how to solve following problem (general, but concretised in following example)? I think this must have been solved many ...
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624 views

SQL Agent job history not found for few jobs

I have;backup ,rebuild Indexes , Update Stats and few other jobs like space alerts, replication jobs etc which run frequently on SQL Server 2102-SP2, Build Number:11.0.5058.0 and I do not see any ...
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MySQL Get first and last day of multiple records

I have a table HC_RSPI_data: | RADIO_TYPE | HOP | TOWARDS | RSPI | TP_NAME | DATE_TIME_END | TIME_LENGTH | RLTM_min | RLTM_max | |------------|-------|---------|------|---------------...
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How to resolve Error 7311 returned by a job running against a linked server?

I have a job and a linked server. The job was working fine for a while, but recently I started getting this error message and I couldn't find a soloution for this. Executed as user: ... Cannot ...
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8 views

JDBC - maximum allowable cursors - how do I see my open statements?

I've got some resource leaking and I'm trying to find what's causing them. I think I have some statements or resultsets that aren't being closed properly. Is there any way to see all of the cursors ...
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50 views

Creating a dynamic database

I'm using mysql server connected to Access, and I want to do a form, to fill the table. My question is how to do it. I need to select the data from a listbox, that's okay this is already done. And I ...
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Get all data from two tables and group it into different category in mysql

These are my tables to build an FAQ: CREATE TABLE `tbl_section` ( `section_id` int(11) NOT NULL AUTO_INCREMENT, `section_title` varchar(100) NOT NULL, PRIMARY KEY (`section_id`), ...
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ANY in postgresql gives weird error

when I do: SELECT ARRAY[4] I get array integer[] ------ {4} and if I do: select * from b where b.ID = ANY (array [4]) That works. Now, something else: select array_agg(4) I get: ...
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Complicated MySQL table reorder

I should do really complicated tables reorder. ****The main table looks like:**** id - some data 1 - ... 2 - ... 3 - ... 6 - ... 9 - ... 12 - ... As you can see, there are "empty" IDs (no 4, 5 ...
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Update all foreign keys to a different primary key

In a MySQL database, I have a table full of business information. Lots of businesses have been inserted twice due to human error, so the same information exists with two different primary keys. Let'...
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169 views

Problem forming a query with subqueries in design view? (MS Access 2010)?

I just started a new job as a dbase admin intern, and due to the database being very large, it is better to do queries in design view, rather than hardcoding the sql. That being said, I cant seem to ...
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38 views

How does 'exists' affect output

I previously asked a question about how to organize a long search query. I have taken it apart. I am presently attempting to understand the function of some of its parts. Specifically, I am ...
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37 views

Need some help building a query to get info from several tables

I have this semi-complex table structure: And I need to return this data: { "id": "10111001", "rep_id": "30000001", "targets_id": "60011001", "brands_id": "10010001", "brand_name": "...
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SQL 2008 R2 Agent stopping sp_who2 running and can't view database or Agent properties

We're experiencing an unusual issue with SQL 2008 R2 SP2 (10.50.4297) where the SQL Agent had stopped but would not restart (this has been fine for months). After investigating the issue we had to ...
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269 views

How to connect to a |Database from SQL Script, in SQL developer

Hi i am trying to connect to a DB using a connection string mentioned in a Script file.. in SQL developer. I am using the below format Connect USERNAME/PASSWORD@HOSTNAME:PORT/Service_name.. But its ...
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Getting count of visits for multiple different outlets

I'm trying to get the distinct count of id that visited different outlets. I have more than 50 outlets so I don't think I can use the IN operator. CREATE TABLE transact ( year int NOT NULL, card_id ...
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How do I cast a varchar to Bigint in DB2

I have a field which is varchar(25) and I need to create a join between that field and a field that is a bigint So I guess I need to convert the field into bigint aswell but it's giving me some ...
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61 views

Explain unexpected result in MATCH () AGAINST ()

I have a database with a fulltext column name. I made a query SELECT name, MATCH (name) AGAINST ('breaking bad') AS score FROM files WHERE MATCH (name) AGAINST ('breaking bad'); So that I can see ...
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75 views

Best practices to segment people and attributes for advertising database

we have a database where we store people some attributes per person in the following tables: people (id, name, email, phone) people_attributes (id, person_id, attribute_name, attribute_value) ...
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118 views

delete query performance issue on mysql

I have two tables table1, table2 where table2 is a subset of table1 (basically created with the query create table table2 as select * from table1 where .....) Now, I am trying to run the below query. ...
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62 views

Is there a way to improve this query further?

I've got a query that over time I've been improving. Originally it simply selected * from the records table, and the data was formatted on the webapp side. But that was slow and I wanted to make ...
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103 views

Poor performance filtering mysql spatial join

First of all, sorry for the crossposting. I ask this question in stackoverflow and they sent me here I have a mysql table with spatial references (GEOGRAPHIC_FILTER), like cities, countries, natural ...
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262 views

Simple avg query on large table much slower in PostgreSQL than SQL Server

I have a database with three tables items, parameters and measurements in both servers and want to query the measuerment table. But the query is much slower in PostgeSQL (9.4) vs SQL Server (2012). ...
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SQL Server 2008 R2 - Capture or be notified when an sql handle is ran

I'd like to monitor a particular SQL handle and find out who (process id) is running the SQL. Is there a way to retrieve either a list of proc ids who executed the SQL handle in last N minutes or be ...
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Sampling and matching samples with spatial conditions

The Problem I have two tables with start points of a route and possible end points of a route which need to be matched against each other. I also have a given distribution for the distance between ...
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69 views

MYSQL — Inventory View with calculated fields

Trying To create an inventory view. I have created this query using MS Access query builder since I am no pro at SQL and this is pretty convoluted. When translating this into MYSQL syntax I get an ...
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83 views

Deleting already duplicated Filestream Files

I have three FileStreams (FS1 on F drive, FS2 on H drive, FS3 on E drive) belonging to the same FileStream group of one particular database (DB) which is in Simple recovery mode in the SQL Server 2012....
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106 views

Removing Orphan Pull merge replication subscriptions

I have a merge replication set where I have removed one of the pulled subscriptions. On the subscriber the subscription shows up after deletion. It will not go away. I tried the methods provided on ...
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286 views

Are there limits to SSRS 2014 RDL files going over to SSRS 2008 (or 2012)?

Is there any incompatibility with reports developed in SQL Server SSRS 2014, and then exported to .RDL files that will be imported into SQL Server 2008?
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Is it bad practice to launch more than 100 sql statements at once?

I have PHP code that is meant to updating the billing status of someone. I only want it to update if the bill has been successfully created and therefore I think a possible solution would be to ...
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202 views

finding out the Backup set physical name

I created a maintenance plan to back up two user databases and system databases over a month ago. I queried the msdb database to view the size of the backups using the following query. SELECT bs....
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Simplifying UNION query that looks for duplicate names

create table sections( id serial, section_name char(255) not null, version_id int not null ); create table section_versions( id int primary key not null, version_name char(255) not null ); ...
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Error when creating Trigger (PostgreSQL 9.4)

I created a table 'Company', and I want to create a trigger so a company can only present in one city, but it can be present in several different cities in the same country. For example, there's only ...
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272 views

Backup and FTP SQL Server databases

We plan to backup our SQL Server 2012 databases every night, FTP the backup files to our test servers and restore them. Then deploy the latest schemas to those databases. The reason for this is so we ...
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Does partitioning help if you don't query on the partition value?

Say I have an orders.Order table that is partitioned on CreatedWhen (a datetime column set to GetDate() when the row is created). The table has over 10 million rows and the partition is quarterly (...
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Is there any way to improve this code?

SELECT tblstud.studid, tblsched.ip FROM tblstud LEFT JOIN tblstudsched ON (tblstud.studid=tblstudsched.studid) LEFT JOIN tblsched ON (tblstudsched.schedid=tblsched.schedid) ...
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PostgreSQL query slow when using tsvector and ORDER BY despite having index

Running on a large database (around 1.5G) The following query takes about 70 seconds to run, SELECT x FROM DBText x WHERE x.status = 2 AND x.publishedTime < 4574590406397 AND x.service = '...
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64 views

Can MySQL Index Merge an Composite index with a single column index?

I am tuning a query and currently have an index as following : Index 1 : (col1, col2) An example query would be : SELECT * FROM t1 WHERE col1 = '1' AND col3 = '2'; I have created an index on ...
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185 views

I can't divide 2 count(*) values without returning zero

The statement I'm using is for a KPI in Maximo and I currently have this statement: select (select count(*) from incident where incident.slanum = 'USERADMIN' and incident.actualfinish > incident....
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106 views

Delete Query throwing warning db2

I am trying to delete multiple records from view The view has Instead of Trigger defined .. The view has records consolidated from multiple tables. [db2inst1@testServer001 ~]$ db2 "delete from ...
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24 views

CHKDB is marked RESTORING

I am seeing this in my Microsoft SQL Server 2008 R2 (SP1) database log: The database 'CHKDB_dbname' is marked RESTORING and is in a state that does not allow recovery to be run. This occurred ...
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Non clustered indexes

I have a questions on Index Our Application is throwing the following SQL eroor Index 'INDEXNAME' on table 'dbo.TABLENAME' (specified in the FROM clause) does not exist. Error: Unknown Error ...
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43 views

Did I Properly Diagnose That It's Not A SQL Server Issue?

We have a job that populates about 450,000 rows nightly in an update/insert job via a stored proc nightly. The .Net app pulls in data from a noSQL DB via an API call then pushes it out via a stored ...
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36 views

Enforce referential integrity for FriendRequest table that has UserA and UserB

I have a table called User that has UserName as a primary key. I want to establish a relationship with enforced referential integrity between User and FriendRequest. FriendRequest has the following: ...
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Veryfing integrity of custom order column with pure SQL

I have two tables, one stores structure (using so called parent field), the other entities that can be embeded into that structure. As certain level of structure can contain both entities and deeper ...
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How to query sum all the wins of each team

Matches ID| radiant_name | dire_name | radiant_win 1 | LV | LGD | true 2 | LGD | LV | false 3 | LV | LGD | false 4 | LV | LGD | false ...
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MySQL - Transactions and causality

I'm new to MySQL's LOCK and TRANSACTION and have a question about different isolation levels of a transaction: Given two transactions executing the same code (auto-commit is false): (1) get data of ...
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114 views

MySQL not using multicolumn index on self join

I'm trying to optimise a query that performs an inner join with itself. The table size is currently 10GB ~50 million rows. /* Count all occurrences between start and end site id of a given speed ...