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

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What would be the most efficient way to store a text messaging (SMS) database

I'm creating a database to store incoming and outgoing text messages for a program that will be responding to text messages. The app has multiple potential responses depending on the message it ...
2
votes
1answer
2k views

SQL hourly data aggregation in postgresql

I am a newbie with database so I'm seeking your help with this one. I have a table containing time series data. 2012/01/01 00:10, 10 2012/01/01 00:30, 5 2012/01/01 01:00, 10 2012/01/01 01:40, 10 ...
2
votes
1answer
450 views

Log shipping - failed over to secondary, how to fail back

SQL 2012 I've been researching and testing Log Shipping as a DR solution. I got the two servers setup. Log shipping is in place and verified to be working correctly. I failed over by restoring the ...
0
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2answers
426 views

Get Date Limitation

So what I need is a limitation for the user of the funded contracts. So this is what I am trying to implement. I am trying to let the user enter dates within the year 2014, which will bring up how ...
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5answers
161k views

How to update a table from a another table

I have one table A has column (id, field_1,field_2), and another table B has column (id,field_2) Now I want to merge table B to A, that means i want to update field_2 in table A to value of table B. ...
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2answers
495 views

Multiple SELECT vs single SELECT over TCIP

My question is a performance one: I need to select roughly 400+ rows, i know their ids. currently i loop in code and fire off multiple queries over tcp/ip - because its easy: ... select [columns] ...
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votes
1answer
1k views

combining two CTE in a single query

Here i have two CTE and i need to select values from these two CTE as a single query. I can able to select values from a single CTE at a time but i dont know like how to merge these two CTE and select ...
4
votes
3answers
862 views

Calculating the maximum seen so far for each point in time

What I'm trying to calculate is a bit tricky to describe, so please bear with me... I have a table with product numbers, and the price of each product each week over a period of 4 years. Price can ...
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0answers
11 views

SQL output question [duplicate]

The results shown below show each branch name, the number of accounts opened at the branch, the number of employees working at the branch, and the number of customers from the same city. Write a ...
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1answer
3k views

Have Postgresql query planner use nested loop w/ indices over hash join

I'm having a problem with some StackOverflow-schema related data loaded into PostgreSQL 9.3.4. I have a query that is taking about 10x longer than it should, due to the fact that it is choosing to use ...
21
votes
6answers
2k views

Count where two or more columns in a row are over a certain value [basketball, double double, triple double]

I play a basketball game which allows to output its statistics as a database file, so one can calculate statistics from it that are not implemented in the game. So far I've had no problem caluclating ...
2
votes
1answer
208 views

Is Query Performance different for different versions of SQL Server?

I have fired 3 update queries in my stored procedure for 3 different tables. Each table contains almost 2,00,000 records and all records have to be updated. I am using indexing to speed up the ...
2
votes
1answer
175 views

Suggestions for SQL query repair tool or tips on building one?

Not sure if this is ontopic so I figure I would ask here and if its not liked then we can close it. Our hosting provider for a legacy application that I inherited is no longer supporting Oracle 10 ...
2
votes
1answer
44 views

Table Compression [closed]

If I create a table like Create table test ( value int, value2 int ) WITH (DATA_COMPRESSION = PAGE) and after executing this create table command I alter table to create a clustered index on ...
0
votes
1answer
815 views

getting error incorrect syntax near @certificate

I have created a certificate and now I want to remove certificate signature and drop the certificate. When I supply the certificate name directly it is working but when I'm making use of local ...
1
vote
1answer
4k views

Is it possible to query value of SQLNET.EXPIRE_TIME parameter?

Can somebody advice whether it is possible to query for current value of SQLNET.EXPIRE_TIME parameter in Oracle 11 DB? Should select * from v$parameter return value of SQLNET.EXPIRE_TIME (if it ...
0
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0answers
2k views

SQL Server 2012 - The application has failed to start because its side-biy-side configuration is incorrect

When opening Sql Server Management Studio I'm getting the following error message: Then when I have a look at the Event Viewer the following message is displayed related to this: Activation ...
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4answers
129 views

Amount of data in a database table

I am trying to run an alter query on a table, and its giving me a Lost connection to MySQL server during query MySQL server has gone away. The query that I am running is alter table table_name ...
2
votes
1answer
87 views

Can't figure out this “trick” to optimize MySQL query

Here's an excerpt of this article: SELECT id, name, address, phone FROM customers ORDER BY name LIMIT 10 OFFSET 990; MySQL is first scanning an index then retrieving rows in the table by ...
2
votes
1answer
87 views

Shrink my database log file, make sense? [duplicate]

I am now taking log backups daily after a long gap(1.5 years). Now when I run, DBCC SQLPERF('logspace') Result, Database Log Size (MB) Log Space Used (%) Status master 1.742188 ...
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0answers
1k views

Login failed for user '' reason:The account is disabled sql error [closed]

i got the error after change my SQL windows authentication security login set enabled to Disabled . But after that i dont able to reset windows authentication security login please help me ...
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2answers
119 views

how to use an index on a mysql query with a where clause and a order by

I have a table CREATE TABLE activity ( id INT(10) UNSIGNED AUTO_INCREMENT, subscriberid INT(10) UNSIGNED NOT NULL DEFAULT '0', action VARCHAR(250) NOT NULL DEFAULT '', ip INT(10) UNSIGNED NOT ...
0
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1answer
96 views

Get people with similar interests

I have a table named SKILLS with two columns: id and skills. id is the id of the user, skill is a particular skill. I need to find other users who have similar interests, like who has the most ...
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0answers
546 views

Using a `mysql_query` to insert category values

Ok I'm importing direct from a csv to MySQL, using a mysql_query to insert values. How do you insert category terms into the Wordpress database structure assigning them to a post. Below are two import ...
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0answers
76 views

appending 2 tables based on common columns in Postgresql 9.3

I have 2 large tables that I need to combine into a single table--for statistical analysis. The two tables have some variations in column named, otherwise I would just use an INSERT statement. So I ...
2
votes
2answers
246 views

MySQL nested queries

I'm working on a project using a MySQL database and we'd like to combine a query which was previously made in several steps into one step. The queries are created in a Java-App using Hibernate. Goal ...
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0answers
16 views

Users_With_Messages Table normal form

I have the following tables in my database: Above these tables (not pictured) is a Users table where the SendingUserId and ReceivingUserId are keyed onto (they are foreign keys). Are these tables ...
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vote
1answer
176 views

How to support multiple updates in this trigger?

Below is the code of a trigger, basically it calls a function in case the record that is being updated does not have other row associated by it's Id in another table. In a multiple row update this ...
0
votes
1answer
129 views

Right outer join seems to not work because of where clause filter

I have the following query, I need to modify it, so that it gives me the result for originDocForCurrency.id = 68 if there is no matching for commission.referenzid = 68. I tried the RIGHT OUTER JOIN ON ...
0
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2answers
523 views

SQL Check Constraint that requires a not null value in a column based on the value of another column

I have a table with the following two columns OnSite BIT NOT NULL ClientId INT NULL I want to add a constraint that requires ClientId to be NOT NULL when OnSite is true(1). I could not find ...
1
vote
1answer
841 views

Insert with different key values to avoid contraint violation

I have a set of Inserts traced of a database and I want to issue them into another similar one. The problem is that I'm getting contraint violation errors due the similar database already has the keys ...
1
vote
1answer
664 views

SQL Server VM in Azure with In Memory

I am running azure and considering deploying a SQL Server 2014 instance due to the in memory feature, however, I was looking through the documentation and couldn't seem to find how to configure ...
0
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2answers
6k views

Split a very large SQL table to multiple smaller tables [closed]

Is it possible to search a column within a table for a numerical value range of 1-2000 and then copy each full row into a different table? By doing so technically splitting the table into smaller ...
0
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1answer
249 views

How to get the nTH row in ordered result set?

I have the follwoing result set from the table PUNCHREPORT EMPLID Name PUNCHDATE PUNCHTIME DEVICETYPE .................................................................. 70 ...
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1answer
1k views

How to restore Network backup to Network Path in SQL Server 2005?

I am trying to restore network backup file to network path.. is there any way to do it? I am using SQL Server 2005 and code.... RESTORE DATABASE DB_NAme FROM DISK = ...
8
votes
4answers
21k views

How to list all views in SQL in PostgreSQL?

How do I list all views for a database using an SQL command in PostgreSQL? I would like something similar to output of the psql \dv command, but preferably just a list of view names. e.g., SELECT ...
0
votes
1answer
140 views

Efficient matching rows across two tables with huge data set

I have two tables with about 300+ columns and 20k+ rows each. Each row is characterized by a primary key which both tables have.I have to find the identical rows, rows with changes,and rows without a ...
5
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1answer
825 views

How does order of index affect performance in SQL Server?

I am wondering how does order of index affect performance (ASC, DESC) ? If it affects, why ? And which order should I choose ?
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vote
1answer
157 views

capability and performance of tags implemented as array vs text vs full text

In terms of search capability and performance, what are the pros & cons of implementing tags as an array or text or full text field? I am seeing limitations of capability in choosing to implement ...
2
votes
2answers
594 views

In PostgreSQL is there a way to rank/weigh columns so as to order the results?

Let's say I am searching through three text columns. I don't just want results that match a given word or phrase, but I also want to weigh them (column A > column B > column C) - thereby ...
3
votes
2answers
667 views

Optimize a query on two big tables

I have a very important query in my system that is taking too long to execute due to huge amount of data on tables. I'm a junior DBA and i need the best optimization I can get for this. Tables have ...
4
votes
3answers
4k views

Change column type from varchar to text in all tables at once

I am using Postgres. I would like to change column type in all tables where column name is "description" from varchar(255) to text. If anyone knows that I would be very glad for your help.
1
vote
1answer
170 views

Stored procedure performs worse than straight query

I have a stored proc that takes 2 dates as parameters. The dates are used to specify a range of dates for the first in a series of CTEs to limit the scope. When I run the query in SSMS as a query, it ...
1
vote
1answer
86 views

MySQL from table to table data transfer

I've got some problem with my MySQL. I have the database with many many data. Well, there is only one table actually with huge ammount of data, over 1 billion rows. For some reasons I need to create ...
1
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0answers
195 views

Match unique id's on import- csv to sql

I have a csv file that I would like to import into a phpMyAdmin database (Wordpress). The CSV file is formatted as shown below: list-id | post_title | slider | ...
1
vote
1answer
750 views

How to aggregate pairs of id values into groups

I have a table with two id columns id1 and id2. Each row shows that 2 id values have been linked together. My actual data has both id columns as varchar(20) but I have used integers in the example ...
2
votes
2answers
467 views

What is the advantage of using numeric primary keys in a relational database?

Many tables in a relational database system (in my admittedly limited experience) have this sort of structure (Oracle syntax as that's what I'm used to): create table widgets ( widget_id number ...
1
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2answers
5k views

join for between multiple tables without common fields

table E : id, title, datetime table L : id, place, xpos, ypos table M : id, title, datetime, contact, agenda table ER : parentid, childid, parenttype, child type data in ER : e.id, l.id, e, l -> E ...
0
votes
1answer
36 views

Why does AttachDBFile make everything slower?

In my ASP.NET app, I had tested a query against a 200.000 rows table with two connection strings, one connect to a remote SQL Server and once use AttachDBFile to attach to a database file in App_Data. ...
0
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1answer
6k views

How to export data from sql server 2008 to excel and email as attachement

I'm new. Can anyone advise how I can export data from database sql 2008 to excel and email as attachment?