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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ERROR: could not find array type for datatype information_schema.sql_identifier

I am trying to run the below sql command: SELECT ARRAY( SELECT column_name FROM information_schema.columns WHERE table_name ='gis_field_configuration_stage' ); and I get the below ...
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718 views

Restore .mdf data file for a File Group in SQL Server

I have a database with three filegroups and each filegroup hosting one datafile. One of the secondary filegroups XYZ with data file xyz.ndf got updated with wrong/bad information in various tables ...
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379 views

MySQL Query - How to get most recent demographics?

I have a table that has duplicated cardnbr's. I need to pull out demographics that are the most recently used by the customer. I have a date field (lastvisit) that shows their most recently used card. ...
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SELECT value from database over ODBC wont reach the software [closed]

SQL Server 2008 R2 latest updates. SQL server ODBC driver version 6.01.7601.17514 PS!!! native drivers are incompatible with the software so i cannot use them. I cannot edit or change the server ...
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Get all comment.message, status.message, users.* and profiles.* where users.user_id exists in friend.friend_id or friend.user_id

I need some help building this query because it's a bit complicated at least for me. I need to get all comment.message, status.message, users.* and profiles.* where users.user_id exists in ...
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1answer
180 views

How to interpret explain sql?

SELECT DISTINCT TB.ID, TB.Latitude, TB.Longitude, 111151.293413 * SQRT( pow( - 6.185 - TB.Latitude, 2 ) + pow( 106.773 - TB.Longitude, 2 ) * 0.988392289802 ) AS Distance FROM `tablebusiness` AS TB ...
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71 views

stack data into a single column

SELECT * would result in: course_id + group ----------------- 1 + SE123 1 + BA134 2 + SE213 3 + SE223 3 + BA344 4 + SE222 I would like it be like ...
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1answer
477 views

Implementing Pub/Sub initiated from the database

I have a number of state-full Windows Services that currently poll the database looking for new or changed records in specific Tables and/or Views. For obvious reasons this limits scalability and is ...
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1answer
252 views

Show all variations of 2 characters in postgres

How would I do this in postgres : Lets say I have an x and a y and I want to show all possible combinations : xx yy xy yx How can I make postgres do this for me ?
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1answer
760 views

Cartesian Product SQL / Inserts with multiple Values Clauses

I want to create cartesian product sql query.But,I'm getting the error.Where I wrong? alter table #Personel ( Ad varchar(100) ) alter table #Masa ( MasaAdi varchar(100) ) insert into #Personel ...
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116 views

Are there situations where queries are formed geometrically?

The topic came up in this other question. We were discussing sign value on a primary key having any significance. If there are good times to use geometry in building queries the sign value could be ...
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38 views

Logic Value of Assignment Expression

I'm doing the leetcode SQL problems and kind of confused with the code below: select distinct Num from ( select Num, case when @prevNum = Num then @count := @count + 1 ...
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212 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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77 views

Process staging table by getting unique rows only (incremential)

I had simple problem with etl on staging table that was answered here: Process staging table by getting unique rows only Now after apllying solution I spotted that will be unusable in production ...
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1answer
48 views

How can I create a bool column for a view based on the result of a statement?

I'm using PostgreSQL as my database. CREATE TABLE groups ( id SERIAL NOT NULL, name TEXT NOT NULL, PRIMARY KEY (id), UNIQUE (name) ); CREATE TABLE users ( id ...
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4answers
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Single SQL query to retrieve data in a particular order (not ASC/DESC)

I have a MySQL table, let's say called reviews review_id, product_id, language_id, rating, review, author language_id ranges from 1 to 10 for 10 different languages. Let's say I determine that my ...
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56 views

SqlServer: can one table's PK be the FK of two table's?

I have three tables project, users and proj_user. The PK of proj_user table is the FK of project and users table's pk e.g.(project_id,user_id) My question is, is it possible if the project_id and ...
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1answer
40 views

How to sum the buy order and sell order in one row per each ticker

I have a table containing some trading information of several tickers and I would like to divide the data into sum(Amount) for buy and sell separately, grouping by each ticker. I have one table ...
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222 views

Suppress display in a column if the value is equal to the value in another column

I have 2 date columns that display side-by-side. I have some dates that are equal. I do not want to display the "equal" dates/duplicate date values in one of the columns. How do I do that? Example ...
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2answers
684 views

Set default value for all columns with specific name within a database

I've got a database that includes an int column project_id on many tables, and I want to script setting the default value to a specific value for all columns with that name in the database. Note that ...
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2answers
77 views

Query Cache Implementation Details

I am new to DBA stack exchange & this is my first question. Kindly help me in finding a low level documentation for Query Cache module in MySQL since I am planning to work with the source code of ...
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1answer
37 views

Problem with foreign keys

I do ALTER TABLE bdt.auth ADD CONSTRAINT `depositor no.` FOREIGN KEY ( `depositor no.` ) REFERENCES bdt.depositors( `depositor no.` ) ON DELETE CASCADE ...
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Creation of a simple field failed in MySql [duplicate]

CREATE TABLE bdt.transactions ( `transaction no` int UNSIGNED NOT NULL AUTO_INCREMENT, data date , by int NOT NULL , hours int NOT NULL , ...
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3answers
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How to return last used record?

I have simple table called ips with 2 field ip and address, which schema is following CREATE TABLE IF NOT EXISTS `ips` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `address` varchar(255) ...
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2answers
315 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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1answer
92 views

PostgreSQL extending UPDATE query

I have the following update query to populate a table storing user stats users: int (pk) user_id date last_visit int (fk) local_site sites: int (pk) site_id site_stats: int (fk) site_id ...
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1answer
467 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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455 views

Based on these DBCC SHOWCONTIG stats, should I index this table?

I have a SQL 2008 Standard server on full mirror (safety). I reorganize all indexes weekly. I am looking into rebuilding a few indexes to improve performance. I ran DBCC SHOWCONTIG on my largest, most ...
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1answer
1k views

Subtract values from SELECT in SQL

I have the following 2 queries.: shipManagementInvoiceNetValue: SELECT IFNULL (SUM (shipManagementInvoice.netto ), 0) AS shipManagementInvoiceNetValue FROM tckopf AS shipManagementInvoice WHERE ...
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1answer
359 views

Attributes from an hstore-column as separate columns in a view?

Let's assume we have a table where it has two columns, one an ID and one an hstore column, which stores key/value pairs. You could query that column as such: SELECT name, attributes->'device' as ...
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1answer
67 views

Migration of MYSQL to MS SQL Server

I need to migrate MySQL db to ms sql server 2012. Found enough information about it - looks like it can be done either with SSMA tool or via Data Import utility in SQL Server Management Studio. What ...
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2answers
614 views

SQL Server 2012. Update second table based on input from first table

I have two tables in two databases: Table01 in Database01 and Table02 in Database02. Both tables have a column called UserID. The UserID column is created when the user creates a new account on the ...
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2answers
882 views

Which schema is better for a shopping project? [closed]

I'm working on a business-to-customer project that has variety of product types. There are a few properties like name, description, brand_id that each product has but there are also many specialized ...
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1answer
106 views

Grouping rows by looking at two columns without considering the order

I have a table looks like this one below: +----+---------+---------+ | ID | VALUE 1 | VALUE 2 | +----+---------+---------+ | 01 | A | B | | 01 | B | A | | 02 | C | D ...
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594 views

How to index for a query with independent range conditions?

What is the best way to index a table that I query using independent range conditions? E.g. WHERE X < ? and Y > ?
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3answers
339 views

Sql Server 2012 Restoring Master and Migrating a server

I am migrating an entire Sql Server instance with 10 databases on it. It has many sql jobs and users. What is best practice regarding the master database? Should I backup and restore this too, or ...
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1answer
523 views

Export just rows modified in last month (date defined by user)

I'm asking if it's possible in MySQL to export just rows modified in a period of time for example in the past month, if it is possible, how?
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1answer
333 views

Need to find the number of employee who are not in all department

i have a table T1 which has two columns empname , department every emp must be in 37 department , but there are some employee who are in less than 37 department . I need to find the names of emp who ...
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2answers
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Only allow one checked row in a Column in SQL Server [duplicate]

Background: I've only just begun programming in SQL... barely begun even. But I have been thrown into the deep-end left to find a way and learn to program SQL. Question: Is is possible to have a ...
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1answer
360 views

Why is CDC capture failing due to a missing dbo principal

I am having a problem running the CDC change capture job against some of my test databases. The error message I'm getting is the following: Executed as user: NT AUTHORITY\NETWORK SERVICE. Cannot ...
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1answer
448 views

optimize big sql query

My query has to return a statistics for example for march containing productname and price and its sidedishes (1:n relation) with the right price of each sidedish and the right tax for each sidedish ...
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2answers
399 views

Using MySQL InnoDB as an Archive

My site has a main MySQL InnoDB table that it does most of its work on. New rows get inserted at a rate of 1 million per week, and rows older than a week gets moved over to an archive table on a daily ...
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2answers
797 views

Database design of Ledger Account and Balance sheet generation

I am building an application which has deposit and loan accounts management, for which i have to develop ledger accounts and then generate balance sheet. Being new to database design, i am having a ...
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2answers
762 views

How to mix pairs of rows without JOIN (in a temporary table)?

I have a TEMPORARY table containing pairs of key/value as id col1 col2 type pair 1 key1 key2 key 1 2 value1 value2 value 1 3 key3 ...
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1answer
647 views

Optimising MySQL query with lots of self-joins

I have an entity_relationship table that describes relationships between entities. Each relationship will have 2+ entities involved. In some cases it can be said that one entity is a constituent of a ...
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3answers
1k views

ORA-00905: missing keyword when trying to create a synonym

I have a problem when I try to create a synonym like this: CREATE SYNONYM B2H.BILLING_USER_ACTIVITY@PACOMNET FOR B2H.BILLING_USER_ACTIVITY@PACOMNET.US.ORACLE.COM; Why does this happen and how can ...
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1answer
213 views

Trouble in Multi-Language DB

I'm working on a DB design for medicines in many countries with different languages. I created a table for the different languages I want and link it to another table of chemicals. But I find that ...
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3answers
122 views

How to convert query results into groups of common results

I have a query that returns results like this: MyValue MyGroup _______________|_______________ 56 | I _______________|_______________ 12 | I ...
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3answers
2k views

INNER JOIN making COUNT(*) slow

I have a very simple query: SELECT COUNT(*) FROM messages INNER JOIN users ON messages.user_id = users.user_id With the join it takes 1146 ms and without it takes 220 ms (220 ms still seems slow to ...
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1answer
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how do I merge two views

I have basically two views named customerV and productV. the SQL statement in the customerV view is : SELECT CUSTOMER_REGISTRATION.SURNAME, CUSTOMER_REGISTRATION.OTHER_NAME, ...