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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10
votes
3answers
7k 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. ...
1
vote
3answers
125 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, ...
3
votes
1answer
4k 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
142 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
25 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
16 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
223 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
304 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
507 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
37 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' ...
0
votes
1answer
35 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
2k 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
646 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
53 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
49 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
28 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
100 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
34 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
132 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
51 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
57 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
108 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
41 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
308 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
81 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
111 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
93 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
44 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
1answer
210 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
33 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
410 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
145 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'): ...
0
votes
2answers
3k views

CREATE DATABASE permission denied in database 'master'. unable to get the permission

I am making a database in sql server and it shows an error that "CREATE DATABASE permission denied in database 'master'" I am using the administrator log in itself. What i need to do? Please suggest a ...
2
votes
0answers
52 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 ...
3
votes
1answer
5k 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
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
674 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
44 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
2k 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
386 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 ...
3
votes
2answers
1k views

PostGIS vs. SQL Server for GIS data

So I'm recently starting at a new company and have a lot of ArcGIS users who seem really keen on going forwards with a PostGIS instance to serve some data to our customers. While I don't have an issue ...
0
votes
1answer
51 views

How I can monitor SQL Server 2012 databases to determine the security privileges that are called by different processes

Is there any tool that can identify the SQL privileges or roles that are being called on query by query basis. We need to know which ones are being used at each time on a Microsoft SQL Server 2012.
0
votes
0answers
95 views

What is the difference between Row and Table Expressions in MySQL

Can anybody explain with example what is a Row and Table expression and what is the difference between them. Any example for clarification will be appreciated.
1
vote
1answer
144 views

UPSERT statement never completes, infinite loop?

Based on some of the stackoverflow answers I wrote the following UPSERT statement, which I think must be stuck in an infinite loop. I added a statement in there to avoid an infinite loop (as it would ...
0
votes
1answer
70 views

JOIN on 3 tables being slow

everyone. Can't figure out what indices are missing or how to rephrase my query. I created about a milllion of test entries in each table to see performance. Query takes about 1.5 seconds which is ...
1
vote
1answer
498 views

Bulk insert in multiple tables

I have two tables on which I perform some bulk inserts: key: key_id(pk), key_name related_key: key_id(fk), related_key_id First Insert: values_data = "($$key_1$$), ($$key_2$$)" INSERT INTO key ...
0
votes
0answers
59 views

table check constraint, greater than > not accepting

CONSTRAINT CK_BABY_YOUTH_CHILD CHECK (case when Passenger_Type='Baby' then Reference_ID >=0) This is my table check constraint, i have no idea why sql server is not accepting ">". Please ...
0
votes
3answers
268 views

What's faster: two UPDATEs with WHERE (in / not in) or one UPDATE with CASE?

What's best performance wise, two separate UPDATEs: UPDATE table1 SET enabled = 0 WHERE code NOT IN ( SELECT id FROM table2 ); UPDATE table1 SET enabled = 1 WHERE ...
0
votes
2answers
3k views

Dynamic Table partitioning on a daily basis

I have a SQL Server database which contains two tables -- Acks and Logs. These two tables are related in logic but not in a relational database way. Basically, every message that comes in gets saved ...
1
vote
1answer
41 views

Should I drop this column or is there a query that can achieve a results table without duplicate columns?

I use a column named active in several of my database tables to adjust whether a particular entry/row/user/etc should be included in future query result tables instead of deleting the information. ...