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

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4
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1answer
351 views

Calculating daily growth using previous row value in new column - SQL Server

I have the following query below that shows size of a database and when this data was collected. I am trying to create a new column that has "average daily growth" which would be determined by the ...
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2answers
52 views

Noob questions on tables in a sql model

I'm a noob when it comes to SQL or PHP and I'm a creating a rather simple car-sharing web site. The user can engage a trip someone created and can himself create a trip. Now I'm currently designing ...
0
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1answer
54 views

Artificially increasing query time

Very weird question: Is there any way to artificially inflate the amount of time a query will take? An infinite loop would be great. SELECT CLAIM.UNIT_PRICE FROM CLAIM WHERE ...
4
votes
1answer
115 views

identify gaps and islands

I have a database that has the following structure +---------------------+------------+---------------+ | timestamp | EngOilP_sd | CompOilLVL_sd | ...
3
votes
2answers
110 views

Computed Column Update when Table Value changes

I have environmental sensors collecting some raw data from environmental stations. In addition to the sensors, there is a physical gauge measuring water height (staff gauge). I'm trying to set up the ...
2
votes
1answer
80 views

Case When over 2 columns return results into 1 output column

I have an issue in SQL Server (using 2014 but not sure that's relevant). I have 2 variables Q20 and Q46 which depending on result I want to output a value to the same column for each result. For ...
1
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0answers
30 views

Looking for a DR-like solution to enable full data warehouse re-load while having secondary copy live

I am looking for suggestions/ideas to the following problem. We have a number of data warehouses for each of our clients (on SQL Server 2014). These data warehouses are maintained fairly fresh with ...
2
votes
1answer
138 views

Oracle: REGEXP_LIKE: Strings with angle brackets aren't found (whether they are escaped or not)

The following question will answer my original question, plus many others. What would the correct syntax be to do a REGEXP_LIKE search (in Oracle Database 12c) for this string (which exists somewhere ...
4
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2answers
226 views

Query to calculate database growth

I have the following query that outputs some good information from MDW data collectors regarding database space usage. I am wondering with the following columns (db size, reserved space, unused space, ...
0
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1answer
42 views

A form including content from two tables

I am working to create a database of all the places or administrative entities of one country. Most work will be about adding new districts. I have to detail which region every district belongs to. ...
0
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0answers
26 views

Using pipelined order by while fetching only first ten rows

PostgreSQL 9.2 I have the table table: id user_id amount PK integer integer and I need to fetch the first 10 rows as follows: SELECT user_id, SUM(amount) s FROM table GROUP BY ...
5
votes
1answer
142 views

Find Shoe Size Selection

I'm developing a feature that allows users to input their foot dimensions and have the proper shoe size returned to them. I'm having difficulty deciding on the best way to implement this feature. The ...
1
vote
1answer
53 views

Calculate column running total

Given the following schema and dummy data: CREATE TABLE transactions ( id SERIAL PRIMARY KEY, memo VARCHAR(255) NOT NULL, amount INT NOT NULL, tx_date DATE NOT NULL ); INSERT INTO ...
4
votes
1answer
96 views

Better database design

I'm using a MySQL database to store data from my java application. In java I have two classes: The VocabularyList class has a name and holds a list of vocabularies. A Vocabulary has a vocabulary ...
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0answers
181 views

Update remote MySQL database upon changes in local SQL Server database

I have a Web store running with MySQL on the remote host. And I have inventory management software using Microsoft SQL Server on my local system. I want to update product stock in the web store when ...
3
votes
1answer
96 views

SQL Joins and Relationships

I am confused by joins. I want to know how to choose the join based on the relationship between tables, or do joins have no dependency on relationship? if relationship is "one-to-one" then "Inner ...
3
votes
1answer
106 views

4m Rows in MySQL, ~5 Minutes to Run Query

I have 2 tables, a users table and a log table which literally logs each time a user signs in. What I'm trying to do is grab a list of all users with a certain rank who have not logged in for over a ...
2
votes
1answer
107 views

MySQL - Ordering 'featured' items first

I need to have the results of a query show featured items first for a given date before listing the day's other items. You can ignore the categories that are being pulled from another table. ...
5
votes
2answers
332 views

Using Left or substring with wildcard in SQL

I am looking to retrieve information from a field, but am having troubles getting exactly what I want. The information I want has no set order and I am also looking for two different things. Here is ...
0
votes
1answer
62 views

SQL Server 2012 Exclude a value

I'm teaching myself SQL, and I ran into a scenario that I cannot seem to solve. Please any help. I have a table called tblRecord with a column called BuyerID, in this case there are two BuyerIDS, and ...
14
votes
9answers
1k views

Alternative to WHERE clause [closed]

Is there a way to only SELECT rows with certain data in a column, without using WHERE? e.g. If I had this: SELECT * FROM Users WHERE town = 'Townsville' is there a way to implement the WHERE ...
0
votes
1answer
27 views

Returning rows based on time of day respective to their timezone [closed]

I also posted this on Stack Overflow. I got no answers there so I'm hoping someone here might be able to help. I have a table in which every row represents a user, I am also storing the user's ...
-1
votes
1answer
172 views

How can I generate a script to choose only top 10 items from each table in SQL database?

I know how to generate scripts that would contain insert queries of all records in all tables. But how can I limit this to top 10 records only from each table?I can select "Data Only" when generating ...
2
votes
1answer
55 views

Create one row for every user in a Postgres table

I have a bunch of rows of users in a users table, for example: | id | name | |----|-------| | 1 | Chris | | 2 | Max | | 3 | Steve | For each one of these users, I'd like to create a row in ...
2
votes
3answers
82 views

Generate a list from columns that do not contain a zero for each row

I have a table TAB1 in an Oracle database: +----+----+----+----+----+----+ | ID | C1 | C2 | C3 | C4 | C5 | +----+----+----+----+----+----+ | 1 | 1 | 0 | 3 | 0 | 5 | | 2 | 11 | 22 | 0 | 44 | ...
0
votes
1answer
490 views

can i shrink log file in full recovery model

i have configured Always on Availability group where iam unable to shrink log file size through simple recovery model. can i shrink the log file size in full recovery model if yes or possible then is ...
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vote
2answers
76 views

How to optimise MySQL query that uses dependent subquery

I have a web app that has a custom feed of images. The image queried are based on whether the users have previously seen the image and ordered by a Hacker News style score. There are only 1000 rows ...
6
votes
2answers
111 views

Combining data from multiple rows

I am relatively new when working with queries so let me apologize in advance. This is SQL Server 2012 that I will be working with. This data has been brought into a staging table through a nightly ...
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vote
0answers
50 views

How to make a query from a database with schemas to a database without schemas, and vice versa, with DBLINK in postgres

I have a DB (DB1) in postgres 9.4 who use DBLINK to query another DB (DB2), and vice versa, using views and functions. But now i have to add 2 schemes to DB1 (CLIENT1 And CLIENT2) and i want when i ...
0
votes
1answer
97 views

Oracle: How to create secondary index based on every word in a CLOB

I have a Table where each record is made up of a VARCHAR2 and a CLOB. The VARCHAR2 is the primary key. There are currently 1.5 million records and growing. The table is only ever used for REGEX ...
2
votes
2answers
271 views

MySQL Escape Characters

I'm getting an SQL error when trying to mix a match against in a SQL statement with a specific character which is not covered by MySQL escape functions in PHP. This is an example: The name to ...
0
votes
1answer
96 views

How to insert values through inner join

Could anybody tell me how to do insert statement with inner join. i am trying to insert ProductName,ProductCompany,ProductPrice,ProductQty in Product table and CategoryName in category Table. And ...
1
vote
1answer
69 views

Sql parent Child Query not working

I want to get parent and their child data which means, parents first, then children. Below is the query that I tried to convert to parent and their children SELECT a.FactorTitle, a.FactorCode, ...
0
votes
1answer
35 views

Pivot Results By Day [duplicate]

I have a table in SQL Server 2008, with mails received from a pop account. The table has the following columns: +------+----+---------+------+------+ | from | to | subject | body | date | ...
0
votes
1answer
145 views

Connecting to the default instance of SQL Server connects to a named instance

I have 2 instances of SQL Server installed on one server: SQL002. One instance is a default instance, SQL2008 R2, and the SQL service is generally not running except for specific tests. The other ...
2
votes
1answer
227 views

SQL query to identify missing hinted indexes

We have a fairly large number of queries using index hints in our 11.2.0.4 database. I recently uncovered some performance issues and found that some of the indexes referenced by the query hints were ...
0
votes
0answers
22 views

Query to get result in Excel file [duplicate]

The following query gives me the error Incorrect syntax near 'OUTPUT'. SELECT * FROM dbo.sales ; OUTPUT USING 'Driver=Microsoft Excel Driver (*.xls); DBQ=c:\\test\\sales.xls; READONLY=0' INTO ...
1
vote
1answer
87 views

table or view does not exist when using insert into

I'm trying to insert into but getting the "table or view does not exist" error. It tells me the specific line where the error occurs but I can't figure out what the problem is: INSERT INTO c_ord_cur ...
1
vote
1answer
159 views

Batch for PostgreSQL query

1) The pgpass.conf (of PostgreSQL) is: localhost:5432:*:postgres:mypassword I have no experience with batch and I have spent the day searching in the net. I'm using Windows - if that matters. 2) ...
4
votes
2answers
3k views

Distinct Combination of Two Columns

I am currently trying to find distinct combinations within a table as two of the columns have a many to many relationship with each other. The data is all around backup policies being run on against ...
1
vote
0answers
69 views

HQL pagination returns same result on different pages - with SQL

We have the following query in the server (using sql): Query query = this.entityManager.createQuery( "SELECT type, id, date, amount FROM Transaction ORDER BY type ASC"); The type field ...
1
vote
1answer
93 views

Merging adjacent date intervals into a single row

Here is the scenario: If the employee transaction is continuous display as-is. if the employee got any gap display as a new row. Below is the sample table Emid Fromdate Todate ----- -------- ...
0
votes
1answer
52 views

Why we can FLASHBACK DROP table where it is DDL command and hence autocommited?

DROP and TRUNCATE both are DDL commands and both are autocommited.Then why we can recover DROP table by using FLASHBACK(unless it is purge) and why we can not recover TRUNCATED data(don't consider ...
2
votes
1answer
31 views

Problem with “not” in full text search

I don't understand why I'm getting these results with my full-text search query in SQL Server 2014. The following query returns results with "Supervisor" in the Title field and "Tokyo" in the ...
3
votes
1answer
65 views

Extend a single week's win/loss ratio calculation to a whole season

I'm quite inexperienced at SQL, and I'm trying to improve a query in a small project. The database schema looks somewhat like this. (I've reduced to relevant information, if there seems to be ...
5
votes
1answer
80 views

How to deduplicate SELECT statements in relational division?

I have a query that does a lot of duplicate work: SELECT visitor_id, '1'::text AS filter FROM events WHERE id IN (SELECT event_id FROM params WHERE key = 'utm_campaign' AND value ...
2
votes
1answer
93 views

How to merge partitions in Postgres?

I have a table that is partitioned by date on a monthly basis beginning January 1, 2014. There is significantly more rows of data in 2015 than there were in 2014 and the data in 2014 is not accessed ...
2
votes
2answers
91 views

Select Count of one table into another

I have one SQL statement as: SELECT ARTICLES.NEWS_ARTCL_ID, ARTICLES.NEWS_ARTCL_TTL_DES, ARTICLES.NEWS_ARTCL_CNTNT_T, ARTICLES.NEWS_ARTCL_PUB_DT, ARTICLES.NEWS_ARTCL_AUTH_NM, ...
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vote
0answers
96 views

Upsert - Should I verify the row exists first, attempt an update, or try to insert first?

In a software that I'm working, I have a table with a few columns and a id. In some events in my software, I need to update some column of a record with a certain unique field (other column), but ...
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vote
3answers
105 views

Finding “islands” of holiday periods for employees

I'm looking for some tips to find a nice solution for my problem: Let's say I have a table, where days of vacation of employees are stored. e.g. CREATE TABLE test_dates ( id NUMBER ...