An acronym for "Structured Query Language" (it's not the name of a specific DBMS product), SQL can be used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. It can also be used to manage schemas and data ...

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22 views

Undo SQL Update Azure DB [duplicate]

I have accidentally updated over 3,000 records in one of my tables hosted on Azure. This was not a transaction and I did not have any back ups for this table. I've read around and found ApexSQL Log ...
2
votes
2answers
83 views

SQL order by query results in any arbitrary (but reproducible) manner

For testing purposes I need to get some data from a set of database tables in any arbitrary (but reproducible) order. The idea being that I can later compare two runs using a textual diff tool. Is ...
0
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1answer
48 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 ...
-1
votes
2answers
86 views

Remove a character from a records enclosed between double quotes

Hi I table in which every row have data like: 0150566115,"HEALTH 401K","IC,ON","ICON HEALTH 401K",,,1,08/21/2014 What i want is to remove every comma(,) that is enclosed between double quotes " ". ...
1
vote
2answers
125 views

How to count the rows from 1 table but from two different column

SELECT distinct Major, COUNT(Major) AS MajorCount FROM [College Management System].[dbo].[ApplicantCourseDetails] group by Major SELECT distinct MinorI, COUNT(MinorI) AS MinorCount FROM [College ...
0
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0answers
34 views

mysql select latest per group using 2 different tables along with self join

I have a query SQL Fiddle which contains 2 tables tbl_data CREATE TABLE tbl_data ( id int(10) unsigned NOT NULL, type varchar(32) NOT NULL DEFAULT '', title varchar(255) NOT NULL DEFAULT ...
1
vote
1answer
21 views

Handling exceptions from inside a function

I need to add a trigger after insert or update on a table so that, where some row is updated and a certain condition is met, then some other table needs to be updated. However, that last update ...
4
votes
3answers
372 views

CHECKPOINT or COMMIT writes to disk?

Let's say, for SQLServer2008R2 and higher, with full recovery mode databases. I always thought : When a transaction is commited (COMMIT), the transaction is written to the transaction log in RAM. ...
-2
votes
0answers
30 views

Midnight Datetime difference - SQL Oracle

We have an application which reads information from SQL and Oracle (testing purposes). A datetime value is placed inside the table: Example: 05/09/2014 00:00:00 When we have this date in SQL: The ...
1
vote
3answers
77 views

How to query for records based on most recent version

I have the following table structure ID, ORDERNUMBER, DATE, STATUS 1, 1, 1-1-01, proposal 2, 1, 1-2-01, proposal 3, 1, 1-3-01, active 4, 2, 1-1-02, proposal 5, 2, 1-2-02, cancelled 6, 3, 1-1-03, ...
0
votes
1answer
35 views

How to generate a sequence in mysql

Consider this table in mysql create table numbers (number int); insert into numbers values (3), (2), (9); select * from numbers; +--------+ | number | +--------+ | 3 | | 2 | | 9 | ...
0
votes
2answers
49 views

Oracle GROUP BY question

I am using Oracle8i Enterprise Edition Release 8.1.7.4.0 - Production. Yes an ancient version but the license is embedded in an application that we use and this is the Oracle version that they use. ...
0
votes
2answers
22 views

mysql combine tables

I have three tables which has the same schema. all of them has 10000000+ rows and has unique data as well as duplicate keys but with a datetime column can differentiate them and get the newest row. I ...
0
votes
0answers
13 views

Query from database a set of infomation and sorting them out while mataining its structure

I am currently using mysql 5.5.32. Below is my database design. It is used for storing student infomation, however each student have 61 "entries" or more(some schools might have more options), eg. ...
1
vote
2answers
42 views

Merits of inserting to temp table and renaming versus just adding/removing columns

If I add or drop columns from a SQL Server table I presume I get page splits or gaps. Since the size of the row has changed. When I use RedGate SQL Compare to create conversion scripts its strategy ...
0
votes
2answers
30 views

inconsistent type after querying search_condition column in all_constraints table Oracle

I'm trying to get the not null constraints in my tables, so I'm using the following sql request : select * from all_constraints where owner='userx' and constraint_type='C' and ...
2
votes
1answer
137 views

Find if Column Belongs to User Table

I want to compute the number of columns with not null constraint in my database. So I thought about querying the table sys.all_columns: select * from sys.all_columns The problem is that it ...
0
votes
1answer
40 views

How can I optimize this Cross Table COUNT() mysql query?

I am trying to cut down the retrieval speed of this MySQL query. All instances of COUNT() point to the PRIMARY key of each field. Currently this query makes my MySQL hang. It seems ridiculous as I'm ...
0
votes
1answer
21 views

equivalent of oracle sql administration query in SQL Server 2008

I'm new to SQL Server administration, and I would like to get the equivalent of this Oracle 9i administration query : select object_type,count(*) as number from all_objects where owner='ownerSID' ...
-1
votes
0answers
15 views

can not make trigger same as query in sqlite3?

My Table CREATE TABLE sensor(sdata integer, timestamp DATE DEFAULT (datetime('now', 'utc')), colnew integer); sqlite query :- SELECT q.sdata, q.timestamp, strftime('%s',q.timestamp) - ...
0
votes
1answer
29 views

Choosing the Most Recently Entered Non-Blank Value When Many Values Exist

I have run into a problem where some IDs have multiple names associated with them. That is, if I have a location ID from one table and need to pull the location's name from another table based on the ...
0
votes
0answers
29 views

PL/SQL Error bad bind variable

Where is the problem with my code. It should work, but Compiler says: Error(5,14): PLS-00049: bad bind variable 'NEW.NAZWA_GRUPY' Error(6,1): PLS-00049: bad bind variable 'NEW.NAZWA_GRUPY' ...
2
votes
1answer
41 views

PostgreSQL Division In Query Not Working

So I am having a really off day or something, but for the life of me I can not figure this out. I am trying to divide tier1 by total to get a percentage of the total. I thought like this: (tier1 / ...
0
votes
2answers
43 views

Triggers not reflecting on procedure

I have a trigger create trigger flightinput2 on reservation after insert as begin update reservation set Departure_Airport='LDN', Arrival_Airport='KUL' where Flight_Code='EM0088' end ...
0
votes
1answer
34 views

Can a SQL Server Subscription Database be unsubscribed and used as standalone?

We've got a new server we want to migrate to and I have setup a Publication on the current production server as a Transactional publication. Since the subscribed database is up to date, I want to ...
0
votes
1answer
25 views

dictionary database relations

I have a dictionary database (french > turkish) which has id, word, caseword, direction and descrblob columns. i don't know how it works this direction column. Because turkish words value is 2, and ...
2
votes
0answers
45 views

Domain name change of SQL servers involved in replication

I have a situation where client wants to change their domain name of servers hosting SQL Servers(e.g. from AB to CD). I have a transactional replication with updatable subscription configured with 1 ...
0
votes
0answers
28 views

Static column based on date condition

I have 2 tables : 1. Table 1 2. Table 2 Both have date parameters say DT1(TABLE1) DT2(TABLE2) The requirement is to create a static column in a report as "TEAE" wherein the value of DT1 is greater ...
2
votes
1answer
70 views

Select the max from two max values

I need to find the airport(departure or arrival) that had the most passengers in the last year. The tables are: PASSENGER(id,name,surname) TAKES(id_passenger,id_flight) ...
1
vote
1answer
34 views

Transaction Rollback

I have a purging process that runs to delete old data from table to avoid table growth. My delete statement would be a simple delete based on join something like below Delete FROM TABLE_A A JOIN ...
0
votes
1answer
35 views

How can I transfer Mysql data to another computer and add it to an exist database

I'm trying to transfer Mysql data to another computer and add it to an exist database Here is the condition: 1. Computer A, A has a database named 'Test'; 2. Computer B, B has a database named ...
0
votes
2answers
14 views

sqlite group_concat error while executing query

I have table: CREATE TABLE www ( Col_1 VARCHAR, Col_2 VARCHAR ); select count(*) from www; --1496 And I have error: "Error while executing query: aggregate function are not allowed in ...
-1
votes
1answer
33 views

Issues with procedures, setting multiple values [closed]

I am trying to set multiple values but I am only able to set one value. This code fails: alter procedure modifyvalue @ID int, @flight varchar(6), @destination char(10) as begin update ...
4
votes
3answers
90 views

Make a Copy of a Microsoft SQL Server 2005 database from a Mirror Copy

I have a SQL mirror database in Microsoft SQL Server 2005. I would like to get a copy of it as a new database so I have the ability to read, write, and backup the database. I cannot break the ...
1
vote
0answers
78 views

Implementing a functionality for processing heavy insertion

I use PostgreSQL 9.1. The scenario is: I receive heavy insertion into Table1 (about 100 rows per sec). For each new row, I have to check the previous and next row of the source table if those are ...
-3
votes
2answers
107 views

Inserting data based on different conditons

Though , i put my efforts in making question easy to understand , but i still dnt know whats going wrong . Anyways , im trying to make it more compact I have below table now only : In column number ...
1
vote
1answer
72 views

Best way to add Foreign Key to massive table?

Say I have 4 tables: arrival (~100 million rows), departure (~100 million rows), airport (~30 million rows), airplane (small). arrival and departure each have 2 ForeignKeys: one to airport, one to ...
-2
votes
1answer
42 views

SQL statement that return Component in each Order [closed]

I have a product detail table that contain the component used in each product Product | Component ---------------------- Product1 | A Product2 | A Product3 | B Product1 | C Product2 | B ...
1
vote
0answers
31 views

Sql Server 2012 Change Data Capture weird behaviour

In my Sql Server 2012 I have the following table in a database CREATE TABLE [dbo].[HumanResource]( [ID] [int] IDENTITY(1,1) NOT NULL, [Name] [nvarchar](50) NOT NULL, [IsHired] [bit] ...
0
votes
3answers
26 views

Column Concatenation

Is it possible to concatenate the rows from two/more different columns into one new column ? Example: C1 C2 C3 ---- + ---- => ---- a d a b e b c f c ...
2
votes
1answer
133 views

Difference data between adjacent rows

I have a table (called Visits) with ReqTime DATETIME NOT NULL column AND Duration INT UNSIGNED column. Duration should be set to the difference of ReqTime for two adjacent rows. But Duration is not ...
1
vote
1answer
70 views

Query does not use index (according to EXPLAIN SELECT)

Can anyone give me an indication, why this query does not use the Key on the table 'gtg'): ...
2
votes
0answers
35 views

Emulating WITH clause in MySQL/query perfomance review

I have never really worked with MySQL queries till this last week. I was tasked with making a simple tool for my department that tracks contacts. Here are the 2 tables and the type of data they ...
2
votes
1answer
363 views

Join tables in two databases make query slow? is better to partition db?

I have a table1 in db1 and table2 in db2 on SQL Server 2008 R2. If I make a select query joining both tables, it's really slow to get the results. A simple query like SELECT * FROM db1.dbo.table1 ...
0
votes
0answers
20 views

How to populate Oracle 10g tables related via foreign key?

As the title says, how do i fill random data in tables, which have foreign key references within each other. I want to then practice all the SQL commands, like, SELECT commands, JOINS, SET FUNCTIONS ...
0
votes
0answers
16 views

Need separate columns that calculates percentage [duplicate]

I have the following table: NAME ------ Alex Bob Bob Tim Alex Roger I need to produce the following: Name Count Percentage ------------------------- Alex 2 33% Bob 2 33% ...
2
votes
6answers
55 views

Need separate columns that calculate percentage

I have the following table: NAME Alex Bob Bob Tim Alex Roger I need to produce the following: Name Count Percentage Alex 2 33% Bob 2 33% Roger 1 16.6% Tim 1 ...
1
vote
0answers
38 views

Low batch Batchrequests/sec

I am running this query to do massive deletion in my database. I am looking at Batchrequests/sec and it is quite low (like 15% of what my server can handle) Is there any way to rewrite this query to ...
2
votes
3answers
191 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: ...
1
vote
3answers
56 views

Removing chat history for a particular user from database

I'm currently developing a web chat application using SignleR and SQL server this is my database schema so far I've added an option where the user can Clear Chat history for a particular ...