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

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1answer
705 views

triggers - using the inserted / deleted tables in Dynamic SQL

Within a trigger, I'm trying to create a unique table name (using the NEWID()) which I can store the data that is found in the inserted and deleted tables. Declare @NewID varchar(50) = ...
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2answers
633 views

Best way to design a database and table to keep records of changes?

I need to setup a history feature on a project to keep track of prior changes. Let's say I have two tables right now: NOTES TABLE (id, userid, submissionid, message) SUBMISSIONS TABLE (id, name, ...
4
votes
2answers
951 views

Check if contiguous date interval exists

I have a table in PostgreSQL which describes some events that have a start date and an end date: CREATE TABLE my_table ( event_id serial NOT NULL, start_date timestamp without time zone NOT ...
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2answers
2k views

Add function parameter to SQL query WHERE clause

I have a web application in java and it uses a query. I don't want to write the query into Java, so I made a function: CREATE OR REPLACE FUNCTION testFunc(inputs text) RETURNS TABLE(...) AS $$ ...
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2answers
916 views

How long to learn PostgreSQL?

I want to learn PostgreSQL and How to make the learning process efficient, but really don't know how long it would take even after googling my question. I used MySQL before and knew relational ...
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1answer
2k views

Do SQL Server Views update their data types automatically based on what tables feed them?

Someone mistakenly created a bunch of nchar fields in database tables. I noticed this, and after examining the issue, we're moving these fields to nvarchar types and trimming the values inside. In my ...
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votes
2answers
3k 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 months and the time has been stored as a UNIX timestamp. There is no regularity to the timestamp (i.e. the ...
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3answers
996 views

Full Text Search With PostgreSQL

i have a table with this rows: Stickers ------------------------------------------------------ ID | Title |Keywords (ts_vector) ------------------------------------------------------ ...
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1answer
741 views

How to Update same table on deletion in MYSQL?

In my Database I have a table: Employee with recursive association, an employee can be boss of other employee. Following is query I used to create table: CREATE TABLE IF NOT EXISTS `Employee` ...
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2answers
459 views

Running different instances of SQL Server from different networks on one box

I want to be able to run SQLSMS and select an instance to connect to but the instances are on different networks. I remotely log on to our server and from there, I want to be able to access our ...
4
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1answer
15k views

Invalid use of a side-effecting operator 'INSERT' within a function - Multiple Inserts in Function

If this is not the right forum please let me know and move it for me. I've just got a bunch of inserts like this toward the end of my scalar function: INSERT INTO [Raptor].[dbo].[UserRole] ...
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3answers
6k views

Stored procedure executes too long

We use SQL Server 2008. When I am watching in SQL Server Profiler I found some queries that take for example 20 seconds. The same query (in a stored procedure) when executed in SQL Server Management ...
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0answers
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Import from dbf - collation

I select data from dbf files through OPENROWSET Visual FoxPro OLEDB. Despite forcing collation on columns (e.g. SELECT name COLLATE Polish_CI_AS FROM Employees) the polish specific characters keep ...
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votes
2answers
103 views

Ordering groups/partition windows by other column values

I have a sample from a database I'm using in SQL server 2014 you can use here http://sqlfiddle.com/#!6/0d98e/1 It looks like this ...
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votes
2answers
415 views

How to get the sum of a particular item id in a column [closed]

Item ItemName PackageID Specifics brandname GRNQty UnitPric GRNValue 102814742801 ALL BRAN FLAKES 1PKT Bran. KELLOGS 7 15.9 111.3 102814742801 ALL BRAN ...
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votes
2answers
507 views

How slow is slow in postgres?

I'm working with postgres for the first time. I have a lot of experience with small / medium size data analysis (i.e. things that fit in ram and can be analyzed in R, Stata, Matlab, etc.), but am now ...
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1answer
3k views

PostgreSQL list of integers separated by comma or integer array for performance?

As per subject, I have a field which is varchar in which i store some numbers separated by commas. The list grows and shrinks based on clients choices. I then use it in queries to check if a ...
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2answers
1k views

How to split a string to and get info from another table in mysql

I have a system to assign score for each sentence stored in a column: TABLE 1: word_scores word score this 3 is 4 a 5 test 1 another 0 sentence 8 TABLE 2: ...
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2answers
2k views

Find the largest databases on my server

I have several hundred databases running on the same MySQL server. How can I get a list sorted by the size of the databases?
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1answer
555 views

Is staggering reindexing jobs a good strategy?

I have inherited a server with 35 databases and a job that reindexes all tables on all databases (using sp_MSForEachTable). It's taking over 14 hours to complete and is now blocking other processes. ...
2
votes
1answer
48 views

Display equal ranking if count is the same

I am trying to figure out how to display ranking correctly where if multiple authors have the same article count then they get the same ranking and then the ranking resume at the correct spot. For ...
2
votes
1answer
182 views

Select distinct values between two values in different field

I have a table named products like this: | product_name | start_year | end_year | |--------------|------------|----------| | wine | 2001 | 2012 | | cheese | 1999 | 2010 ...
2
votes
1answer
114 views

Create a grouping based on chains of pairs

Say I have two tables: CREATE TABLE datum ( datum_id SERIAL PRIMARY KEY, datum_text TEXT NOT NULL ); CREATE TABLE datum_pair ( datum_id1 INTEGER NOT NULL REFERENCES datum (datum_id), ...
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votes
1answer
70 views

Auditing/Logging Help

I'm working on a request to start logging some additional data for PCI compliance. I need to log who, when, and what changed on a set of tables. I set up SQL auditing which would work fine except ...
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votes
2answers
316 views

Call UPSERT function multiple times to different inputs

I have a function: merge_vehicles(vid, cid, vname, reg_no, name, name_1st) Can i call it multiple times on inputs like (2335, 55, '246BDH', '246BDH', '811', 1), (2336, 55, '038THX', '038THX', ...
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3answers
3k views

Can I use PHP function strtotime() in SQL queries?

I have this table, and I need to use a PHP function in the query. id time lastTime 1 08:02 2 08:04 3 08:30 I am using this query with the strtotime(), and it's not working: ...
2
votes
1answer
342 views

Select data based on records created_at column

I have two tables Keywords, ProjectReports: http://sqlfiddle.com/#!15/06ae3/1 As you can see in that example everything works fine, but I want to get more data from those 2 tables and I don't know ...
2
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2answers
2k views

Speed up bulkinsert on sql server

We're doing some testing and this involves adding 10.000 rows every 10seconds in a table that has 4 int columns and one of them is clustered index. When we run the app the first bulkcopy takes around ...
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3answers
1k views

Is transaction log lost after backup on SQL Server?

I have database that has regular nightly backup (full recovery, full backup). I noticed some irregularities in data and wanted to check out transaction log to see what happened. I restored earlier ...
2
votes
1answer
464 views

Group activities in activity feed by users and products

On my website I'm building an activity feed where I got the basics done and are now making some improvements here and there. One of them is the grouping. I've built it so that if multiple users buys ...
2
votes
1answer
549 views

Restriction on self referencing on insert in MYSQL?

How to restrict insert on adding self referencing rows in a recursive relation table (a table contains foreign key points itself). mysql> SELECT * FROM Employee; ...
2
votes
2answers
4k views

Querying a database efficiently for a huge chunk of data

Here is my query SELECT * FROM ( SELECT a.*, rownum rnum FROM ( SELECT id, data FROM t ORDER BY id ) a ...
2
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3answers
4k views

Mirroring Databases in MySQL

Is there a way to mirror databases in MySQL? In SQL Server, you have the ability to link 2 databases in a master to master relationship. One DB will accept transactions and the transactions will be ...
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2answers
3k views

CREATE INDEX for long columns

I am looking for alternative to create index on long column: create table line ( field_key integer not null, value varchar(4000), ... ); create index key_value_idx on line ...
2
votes
1answer
206 views

SQL from/where or join?

I was wondering performance wise what would be faster a join or a from and where query. I am trying merge and update query but performance is terrible?
2
votes
1answer
574 views

SQL Server 08: Union over while

I've done some reading on this, and I keep seeing people say it's a bad idea, but hear me out! I have a stored procedure which needs to find a series of timeslots over a number of days. Due to the ...
2
votes
2answers
485 views

Check Index Fragementation Query

I'm completely stumped. I'm a relatively new SQL Server DBA so I'm at a loss with the following situation; hoping maybe someone had an idea. I have a new production SQL Server (Windows Server ...
1
vote
1answer
260 views

Full text search on multiple joined tables

I'm trying to set up a full text search in PostgreSQL but coming across the problem that the more tables I join to the query the fewer the results I get back. The tables I am trying to join are: ...
1
vote
1answer
198 views

Entity ID field that can refer to multiple tables?

In designing both audit tables and notification tables, I've run into an issue where I need a row to refer to an entity in another table, but which table that entity is isn't always the same. For ...
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vote
2answers
3k views

Identify rows that match on a key but differ in other columns [duplicate]

Supposed I have table temp A and table temp B: IF OBJECT_ID('tempdb..#A') IS NOT NULL BEGIN DROP TABLE #A END IF OBJECT_ID('tempdb..#B') IS NOT NULL BEGIN DROP TABLE #B END CREATE TABLE #A ( ID ...
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vote
1answer
326 views

How to remove object from json array?

My table: CREATE TABLE items ( id BIGINT PRIMARY KEY NOT NULL, name VARCHAR, images json ); images format: [ { "id": "owner", "full": "<url>", "thumb": ...
1
vote
1answer
306 views

optimize the query with big and low cardinality

I have big enough dataset and few joins to get them all with help next query: SELECT DISTINCT c.c_id FROM c_active z1 INNER JOIN cs c ON (z1.cv_id=c.cv_id) INNER JOIN indi i ON (c.m_id=i.m_id) INNER ...
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vote
1answer
543 views

type recognition with MonetDB, *create* tables from CSVs

I am confused whether you can copy records into a new table in MonetDB. The official documentation seems to talk only about copying into existing tables. I have quite a large universe of billions of ...
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1answer
1k views

Postgresql Database on external HD

I'm completely inexperienced with PostgreSQL, but have to do some work on it, and I have been googling for a solution for almost two days. I hope someone here can help me out. I have a PostgreSQL ...
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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 ...
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vote
1answer
3k views

Cascading Inserts in MySql

I have a users table that has a one to one relationship to a user_preferences table (primary foreign key user_id). When a new row is added to the users table (new id added), is there a way to setup ...
1
vote
1answer
596 views

Merge 2 tables and fetch data one by one

I have two tables: product & offers. products has (prod_id, category_id, prod_name, brand, price, status) offers has (offer_id, prod_id, offer_type, discount_amt, validity) I want to display ...
0
votes
1answer
617 views

Find columns with different values compared with a reference row

My table, MARC, has more than 200 columns with WERKS (plant) as the key. Most of the entries in MARC have values that come from a reference plant. So, usually, all the 200 columns will contain the ...
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1answer
1k views

Select rows from table where each row refers to a different schema

I have customer table in public schema. And I have a schema named after each customer. Each customer schema contains different tables like portals, plugin, ... When I want to select portals used by ...
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3answers
167 views

Allowing users to compile / run PLSQL and SQL

As a DBA - assuming my users are knowledgeable with PLSQL and SQL - why would I not grant my users privileges to compile and run their own PLSQL code. We have an MI database environment where the data ...