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
63 views

How to JOIN more than two tables?

Following is the schema of my Tables: Marks_Table (SubjectCode,TypeID,MarksObtd) Subjects_Table (SubjectCode, Subject) Types_Table (TypeID, Type) I want to Select the Marks_Table table with ...
0
votes
1answer
42 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 ...
0
votes
3answers
280 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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votes
2answers
963 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
95 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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votes
1answer
22 views

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 , ...
0
votes
3answers
77 views

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) ...
0
votes
2answers
363 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 ...
0
votes
1answer
460 views

Query improvements without UNION

I have the following scenario. A users table, a records table and a memberships table. A user can be associated to zero or more records either directly with the records table records.user_id = ...
0
votes
1answer
112 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 ...
0
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1answer
633 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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0answers
582 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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votes
1answer
2k 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 ...
0
votes
1answer
535 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 ...
0
votes
2answers
758 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 ...
0
votes
2answers
1k 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 ...
0
votes
1answer
117 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 ...
0
votes
2answers
797 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 > ?
0
votes
1answer
682 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?
0
votes
1answer
390 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 ...
0
votes
2answers
1k views

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 ...
0
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1answer
469 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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votes
2answers
434 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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votes
2answers
865 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 ...
0
votes
2answers
822 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 ...
0
votes
1answer
690 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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votes
3answers
2k 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 ...
0
votes
1answer
234 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 ...
0
votes
3answers
123 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 ...
0
votes
3answers
3k 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 ...
0
votes
1answer
2k views

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, ...
0
votes
1answer
584 views

MySQL table with multiple values in one field

I'm building a database for a real estate company. The real estate properties are managed by sales people using a CodeIgniter website. How should I proceed with the database design for this table? ...
0
votes
1answer
124 views

TSQL - Bringing Data Together from Different Sources …refactoring PK and FKs

I have various offices and one central head office. Each office has its own SQL Server instance so each office has its own data set with its own set of IDs. Each office has already imported data ...
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votes
2answers
2k views

How can I truly DELETE data from a SQL Server table - still shows up in notepad in backup file?

SQL Server DELETE only marks as DELETED though leaves as data in the data pages. Data pages are 1024 KB in size and this problem can be eliminated by adding a FILLFACTOR that ensures only 1 record ...
-1
votes
1answer
790 views

Directory lookup failed during log shipping

I have configured log shipping for all our SharePoint 2010 databases. All worked well since Friday and today Monday I ran this query: SELECT * FROM [msdb].[dbo].[sysjobhistory] WHERE [message] like ...
-1
votes
2answers
2k views

Select query having count and variable

I have a table like the one below. I need to form a select query. I'm going to pass a RefID like SELECT SNo FROM Register WHERE RefID = 1 And beside the SNo in the Statement, I need to have ...
-2
votes
1answer
55 views

Process staging table by getting unique rows only [closed]

I have several staging tables where I bulk import data with duplicates and sometimes I upload historical data mixed with real-time data, just importing everything without caring if it is already in ...
-3
votes
1answer
8k views

What is the Difference between SQL Server 2008R2 and SQL Server 2014?

I want to take my project from SQL Server 2008 R2 to SQL Server 2014. But I want to learn what is T-SQL the difference between 2008 R2 and 2014 for Database Engine? I mean is there any end of life ...