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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1answer
215 views

MySQL add few column exception for TRIGGER UPDATE FOR EACH ROW

How to effectively add column id, name exception for trigger: CREATE TRIGGER updated BEFORE UPDATE ON table1 FOR EACH ROW SET NEW.date=NOW() so that date=NOW() will be affected on updating any ...
2
votes
1answer
30 views

Select columns dynamically from sql server table

Lets say I have a table that actually store record which looks like Create Table dbo.Info ( SN int primary key identity(1,1), FirstName nvarchar(50) not null, LastName nvarchar(50) not null, ...
1
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1answer
21 views

Attach Database is disabled in Microsoft SQL Server 2012 Management Studio

I have buy from Godadday hosting and domain, after that I have create database in godaddy and the connect to this db using my authentication. I have .mdf, .ldf that need to attach to the connected ...
1
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2answers
64 views

Why would you put Identity Increment other than 1 in SQL? [closed]

In SQL Server, you can set the increment of an identity column other than 1. In what situation would you do that?
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2answers
209 views

Is possible to optimize this query or it's already optimized?

I've three tables: default_users, default_profiles, default_friend. This are the SQL for each one: -- -- Table structure for table `default_users` -- CREATE TABLE IF NOT EXISTS `default_users` ( ...
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1answer
23 views

Rename PK column names when they are FK in another tables

I need to change the names on PK columns and that has relations with another tables meaning they are FK also so this is what I am doing: SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET ...
2
votes
1answer
831 views

SQL Timeout to Principle Server Error

I am seeing a timeout to the Pricincipel SQL server (2008 R2) The exact error I am seeing is this: Timeout expired. The timeout period elapsed prior to completion of the operation or the server ...
1
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2answers
440 views

After Restore Log_reuse_wait_desc of Replication

I'm wondering if anybody has ran into this issue before and has any suggestions on what's causing it/how to fix it. We are restoring a database into lower Dev environments and after the restore the ...
1
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3answers
140 views

Remove duplicate values from query result

I am using Postgres 9.3.9. I have 2 tables : f_agent : CREATE TABLE f_agent ( f_agent__id bigserial NOT NULL, f_agent__total_users integer NOT NULL, f_agent__dim_time_id integer NOT NULL, ...
1
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0answers
27 views

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 ...
0
votes
0answers
20 views

SQLite table design for PK and/or UNIQUE

I'm trying to design a table in SQLite3, where I can perform these 2 actions. INSERT new row where a unique primary key is created. And INSERT new row with an given primary key Think of a ...
1
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0answers
19 views

Check for a value from table 1 in table 2 [migrated]

I am struggling with how to do this and the examples I have found seem overly complicated for what I need to accomplish. I have two tables in separate databases. I need to see if Db1, table1, column2 ...
5
votes
3answers
203 views

Postgres is performing sequential scan instead of index scan

I have a table with about 10 million rows in it and an index on a date field. When I try and extract the unique values of the indexed field Postgres runs a sequential scan even though the result set ...
27
votes
6answers
39k views

How do I efficiently get “the most recent corresponding row”?

I have a query pattern that must be very common, but I don't know how to write an efficient query for it. I want to look up the rows of a table that correspond to "the most recent date not after" the ...
2
votes
2answers
90 views

Query: How to get both Question and multi Answers in one query

For this question, Question and Answer are just my example tables for one-many relationship. For example: Question(QuestionID, QuestionTitle, QuestionContent) and Answer(AnswerID, AnswerContent, ...
1
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1answer
426 views

SSIS Package Execution From Visual Studio Unit Test

Hello I am attempting to run a test which contains the following code: string pkgLocation; Package pkg; Application app; DTSExecResult pkgResults; ...
-1
votes
1answer
65 views

Group by creating problem in Ranking of player [closed]

CREATE Table dbo.[#TMP] (UId uniqueidentifier, Points int, DC datetime, CId int, Username nvarchar(50)) ...
0
votes
1answer
32 views

Count in an other table and show only theese records in query which has more than they used in other table

I have for example 2 tables: used(us_id, code_id); codes(code_id, amount) I want something like this: If for example I have 5 eggs, and egg code is 1, then if the used table have reached 5 of ID ...
0
votes
0answers
15 views

how to get tag record with its descriptor from pi database?

I want to get the data with tag, time ,value, descriptor from pi database, but it seems tag record and its descriptor are stored in different database. tag, time ,value is stored in database ...
0
votes
2answers
148 views

Group or Order SQL output into a single row

I want to display each persons contact info and their commissions in a single row as oppose to multiple rows. Commission Table ID COMMISSION DATE ...
4
votes
2answers
66 views

Grouping by sequential relationships with Postgres

This is quite similar to this question about continuous ranges, and this question about grouping by sequential numbers, but differs in that the sequences are not numeric. Given the following ...
2
votes
1answer
27 views

Detect circular relations in a distribution table

I have the following two tables, that will define distribution rates from items on table A to other items on table A (I think I can say B defines a many-to-many relationship for A with itself). ...
3
votes
2answers
2k views

SQLite writing a query where you select only rows nearest to the hour

I've got a set of data where data has been taken approximately every minute for about three month and the time has been stored as a UNIX timestamp. There is no regularity to the timestamp (i.e. the ...
3
votes
2answers
117 views

Filter and append data to row

My query and my data set (copied from sqlfiddle): CREATE TABLE one ( id int4 primary key, p_id int4, k_id int4 ); CREATE TABLE two( id int4 primary key, p_id int4, k_id int4, ...
18
votes
8answers
6k 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 ...
1
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2answers
59 views

How can I run a SQL job every 1 second? [duplicate]

I have an SQL Job which processes minimum amount of rows at a given time. Currently its running every 10 seconds which is the minimum available in Job Scheduler. But because of that the table used ...
0
votes
1answer
36 views

PostgreSQL window functions very slow on big table

I have a PostgreSQL table constructed as device_id | point | dt_edit ----------+-----------+---------- 100 | geometry | timestamp 101 | geometry | timestamp 100 | geometry | ...
0
votes
1answer
25 views

Oracle: Recursively self referential join with nth level record

I have self referential table like this: id |level | parent_id ---------------------- 1 |1 |null 2 |1 |null 3 |2 |1 4 |2 |1 5 |2 |2 6 |3 |5 7 |3 |3 ...
1
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0answers
5 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 ...
1
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1answer
138 views

Query does not use index (according to EXPLAIN SELECT)

Can anyone give me an indication, why this query does not use the Key on the table 'gtg'): ...
3
votes
3answers
195 views

Do I want an index if all I care to query is field not null

In SQL, do all the common considerations about indexes apply if everything I'll ever want to query (in the where condition) is when a field is not null? Is there a special configuration of the index ...
2
votes
1answer
19 views

How to Choose Between VALUES and SELECT for INSERT?

This answer raised the question for me how to choose between VALUES and SELECT in such a function . Using PostgreSQL 9.4.3 on x86_64-unknown-linux-gnu, compiled by gcc (Debian 4.9.2-10) 4.9.2, 64-bit: ...
1
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0answers
26 views

How to use variables in a PL/pgSQL function with dynamic queries?

...and when must I use EXECUTE ... quote_ident(variable)? Taking an input to the function as text and storing part as a variable: wtype := split_part(message, ' ', 4); realval := ...
0
votes
1answer
17 views

Slow fill database

The source sends in my program a large number of rows. When the number of rows such as two thousand per minute for one table, all is saved in the database properly. But if you send two thousand per ...
1
vote
1answer
184 views

Query multiple rooms with different conditionals (Adults, Children)

I have a simple query where I select available x Rooms with x Adults + x Children per hotel that matches a date range, but I'm having a hard time trying to figure out how to query a list of rooms per ...
0
votes
2answers
39 views

Display Total under name column and sum of amount under sal column [closed]

in a table empno,ename,sal,hiredate is there. but i want output is empno ename sal hiredate 122 ganga 2000 1989-02-06 123 reddy 3000 1986-06-02 Total 5000 here empno, hiredate column ...
0
votes
1answer
609 views

DELETE from Linked Server table using OPENQUERY and dynamic criteria

I'm attempting to run a DELETE statement from my local MSSQL Server to delete appropriate records from a table in my remote linked server using OPENQUERY(). I'm using the following code, but it seems ...
7
votes
2answers
4k views

Database size - MDF too large?

I'm maintaining a SQL Server 2005 database which hosts approximately 2.9Tb of data (2 x 1.45Tb - I have a RAW schema and an ANALYSIS schema so basically two copies of the data ingested). The recovery ...
2
votes
2answers
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 ...
1
vote
1answer
47 views

Replace Yes with 1 and No with 0

I get a data set and an example of the field is below. The values if these fields is "Yes" or "No". I would like to replace the value of "Yes" with 1 and the value of "No" with 0. This file will be ...
4
votes
2answers
34k views

Selecting two values from the same table but under different conditions

I want to grab a value from a table into two different columns for different values from the same table. Use this query as an example (notice how the select is on the same table aliased as 2 different ...
1
vote
0answers
20 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 ...
0
votes
0answers
15 views

SQL Server 2012 Extended Event-Set Session Event Filter

I am doing an exercise to create a new session using SQL server 2012 extended event feature. --I am not able to see the drop down menu for 'set session event' filter when using 'new session wizard. ...
3
votes
1answer
143 views

How can I prevent having inconsistent data under isolation level serializable in Oracle SQL?

I have the following table: InStores +--------+---------+-----+ | ProdID | StoreID | qty | +--------+---------+-----+ | p1 | s1 | 25 | | p1 | s2 | 70 | +--------+---------+-----+ ...
1
vote
2answers
54 views

Why this query returns rows that I don't want to be there

I'm trying to running this query: SELECT * FROM (`default_users`) LEFT JOIN `default_profiles` ON `default_profiles`.`user_id` = `default_users`.`id` WHERE `default_users`.`group_id` ...
1
vote
2answers
105 views

Execute SQL query after execute TRUNCATE in a table

I have a table called fos_user_user where I have a default record "always". Since I'm testing all the time and sometimes I need to clean that table I'm asking if there is any way to run the following ...
1
vote
4answers
372 views

Database/Storage engine suggestion for a project involving heavy inserts?

I am looking into a project which involves large number of inserts daily.I will have a list of user's (for example a user set of 500k ) , for which I need to monitor daily certain activities ...
0
votes
0answers
10 views

Cannot create 64bit ODBC DSN entry to local SQL2008R2

Environment: SQL Server 2008 R2 server (Express Edition) running under Windows 7 64bit Professional. I want to access the server locally via 32bit VB-application and 64bit Web application. SQL ...
2
votes
0answers
28 views

SQL Server database suspect

All the databases went to suspect mode on a server. Tried bringing on-line by taking emergency but did not workout . Have restarted the server as there is disk I/o error still in suspect mode. Can ...
0
votes
1answer
121 views

How do you use COLUMN_JSON with COLUMN_GET on dynamic columns in MariaDB?

When I do the following query; SELECT name, COLUMN_GET(attr, 'appearance' as char) as 'attributes' from items; I see the 2 columns including the blob data with the weird formatting. Is it ...