An acronym for "Structured Query Language", 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 access privileges.
1
vote
1answer
8 views
When Should I use Shrink Option
I have seen a lot of Blogs stating that shrinking is not a good habit as it will reduce the performance of the system. I agree with all those things it will lead to side effects like ...
0
votes
0answers
13 views
Where condition execution sequence in MySQL [duplicate]
I am using MySQL 5.0.88. I have a query like
select DISTINCT party.id FROM party LEFT join party_identifier AS pi ON pi.party_id = party.id WHERE (pi.source_note=? AND first_name LIKE ? OR ...
0
votes
1answer
18 views
How to forcibly flush the undo log/tablespace of UNDOTBS1
I'm looking for a way to flush the undo logs so that the UNDOTBS1 doesn't give me an error saying that my tablespace isn't large enough. I tried using a commit, but without success, it still gives me ...
-1
votes
0answers
28 views
How can I delete duplications with one query? [closed]
Is there any way to delete duplications with one, or only two queries? I'm not good with SQL.
Now I'm trying this solution:
$le = mysql_query('SELECT * FROM tbl_answers');
while($i = ...
5
votes
3answers
629 views
Do you know an easy way to generate one record for each hour of the past 12 hours?
I have a report that shows the count of events for the past 12 hours, grouped by the hour. Sounds easy enough, but what I am struggling with is how to include records that cover the gaps.
Here is an ...
1
vote
1answer
21 views
Postgres 9.2 select multiple specific rows in one query
I have a table with three columns,
Id Serial.
Value real.
timein Timestamp.
I want to select the values based on a range of days ie. from two days ago until now. The table may contain one or two ...
4
votes
1answer
53 views
How to get a row_number to have the behavior of dense_rank
I have a stored procedure will be used to page through data. One of the requirements of the procedure is to have a parameter that will be used to sort two columns of data, the sorting should be used ...
0
votes
1answer
35 views
How to migrate data from SQL database to MySQL including flat files?
one of my friend has asked some asp developer to make online application where user can upload files also. jpg, doc, pdf and all these files are saved in SQL database as flat file. Now my friend asked ...
4
votes
4answers
2k views
Over use of Oracle With Clause?
I'm writing many reporting queries for my current employer utilizing Oracle's With clause to allow myself to create simple steps, each of which is a data oriented transformation, that build upon each ...
2
votes
2answers
78 views
How to optimize a log process in MySQL?
In my project, I have about 100.000 users and can't control their behavior. Now, what I would like to do is log their activity in a certain task. Every activity, is one record which includes columns ...
0
votes
1answer
19 views
Separate table by often changed / not often changed data?
I have a application which querys different gameservers, and stores for example if the server is online, and how many players are connected. But of course there is also data which is changed rarely.
...
2
votes
1answer
31 views
How can I include more query in one query?
These are my tables:
tbl_answers =>
aid
qid
answer
uid
dateposted
emailnotify
namedisplay
status
isbestanswer
tbl_questions =>
qid
question
...
0
votes
1answer
62 views
Replicating Results of Queries on Oracle
I wan to setup a database such that its data come from queries run on a remote database. Basically the source database is very slow and we have no control over it. So, I want to create a second ...
3
votes
6answers
102 views
Backup very large table
I have to update certain values of a large table (for the sake of a presumed example, it is called 'Resource' and it is over 5M rows) and thus I have to make a backup before performing the changes. We ...
0
votes
0answers
29 views
Simple SQL statement [migrated]
I've been over-thinking this too much. Let's say I have a table TEST(refnum VARCHAR(5))
|refnum|
--------
| 12345|
| 56873|
| 63423|
| 12345|
| 56873|
| 12345|
I ...
2
votes
2answers
23 views
MySQL many to many relation
Sorry is this seems a stupid question, but I have a table of server addresses and a second table with a list of hardware devices which use the addresses, it is possible for multiple devices to use the ...
1
vote
2answers
256 views
Oracle Linked Server query error
We have a problem with a query from a SQL Server 2008R2 - 64bit
to an Oracle Linked Server.
We use the Oracle 64-bit driver for Windows.
When we query a certain table we get the following error:
...
0
votes
1answer
74 views
Second time query execution using different constants makes faster?
Can someone explain or direct me how execution on indexes happen with different constants at intervals in Mysql. I notice only for the first execution on the table it takes time, after that with ...
0
votes
1answer
76 views
Looking for performance improvements for this query
This query is taking a long time to execute. We are expecting results in 0 sec, if possible.
Please help me to do any other following:
Rewrite the query
Suggest any indexes
Any other optimization ...
3
votes
1answer
44 views
Convert SQL Server 2012 SSIS package to 2008
I've created a few SSIS packages in SQL Server 2012 that I need to run on SQL Server 2008. I've been told that it is impossible in their current state.
Is there a way to convert the 2012 packages to ...
7
votes
3answers
345 views
Worse performance on a new server
We've been on a dedicated server (single quad-core, 6 GB RAM) and are moving to a new dedicated server (2x hex-core, 32 GB RAM). Both are Windows Server 2008, SQL Server 2008. The performance on the ...
0
votes
1answer
22 views
createdb command error : could not connect to database
I am using the following command for creating database in postgresql.
createdb -D pg_default -E UTF8 -h localhost -p 5432 -U pramil -W pramil mydb
but this command results prompt for password.When ...
0
votes
1answer
31 views
String replace using concatenated strings from various columns
I'd like to remove a substring in a column via update statement. The substring to replace consists of multiple strings from other different columns but in strict order.
The specification says:
...
0
votes
2answers
64 views
Use an Alias in Where Clause Subquery
I need to show some fields from another table in Oracle. Here is my query:
SELECT
ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI AS KODE,
ANGGARAN.SIMPEG_PEGAWAI.NAMA,
ANGGARAN.SIMPEG_PEGAWAI.NIP,
...
0
votes
2answers
26 views
Query WHERE clause and JOIN
I'm having an issue using a WHERE clause and JOIN.
SELECT * FROM `CallDetailRecord`
WHERE `StartTime` >=1357102799000
AND `StartTime` <=1357880399000
JOIN `CallEvent` ON `EventID` = ...
1
vote
1answer
23 views
Insert Row With Foreign Key Equal to ID - Circular Reference
In MySQL database I have an events table which has a circular reference to itself with the following columns.
id (PK) | user_id (FK) | event_id (FK) | title
Each new row inserted has a circular ...
3
votes
1answer
39 views
Create Scheme that allows for fluidity between entities
We are a small rapidly evolving company and recently investigated switching databases from SQL Server to a graph database. We like the graph approach because of the fluidity and openness that it ...
2
votes
2answers
77 views
Using T-SQL to dynamically create Extended Properties
I would like to add Description and Status in the Extended Properties of a large database to all my tables and columns so that someone can fill in the values.
It would be very laborious to add these ...
1
vote
1answer
48 views
How can we get table name from inside trigger?
I need to pass the table name from trigger to procedure.
ALTER TRIGGER [dbo].[Trg_ProjectCreation]
ON [dbo].[Projects]
AFTER INSERT
AS
BEGIN
SET NOCOUNT ON;
-- procedure call
...
1
vote
6answers
47 views
Best practices with large amount of data
I'm building a solution and I have a question.
All my data is currently stored in a unique table. Each row of data is associated with a type.
My question is, what's the best practice for defining a ...
4
votes
2answers
69 views
Should I use a composite or single-column index?
I have the following columns in my database table (Medicines).
ID bigint,
MedicineName nvarchar(50),
BrandName nvarchar(50),
MedicineCode nvarchar(20),
and price,quantity.
I am making a stored ...
6
votes
2answers
69 views
Is there any way to trace optimizer's work in MySQL?
Just like the MEMO structure in SQL Server which is kind of a "paper trail" of steps the optimizer takes in optimizing the query. Is there anything in MySQL through which I can get the information ...
0
votes
2answers
25 views
Running a Job from a Stored Procedure in another server?
How can I run a job from another server using a stored procedure?
Let's say
server 1 : db1
server 2 : db2
username : testssis
password : testssispass
sqljob found in db2: job1
Here is the part ...
-1
votes
1answer
34 views
Adding a column at a specific position using DBMS_REDEFINITION
Can anybody tell me how I can add a column to table at a specific position using the DBMS_REDEFINITION package from Oracle?
0
votes
3answers
121 views
T-SQL Issues With Defining 'AS'
I am creating a fully dynamic application but have ran into a bit of a hiccup. There are multiple 'undefined' fields that can be defined by the users. The only problem is redisplaying them. Currently ...
3
votes
2answers
77 views
Error while taking backup using SSMS
I am using SSMS. I have about 5 logins. For a particular login I have all server roles other than sysadmin. It is a sql login (not windows authentication). In user roles it has all permission for ...
0
votes
0answers
29 views
Match two large tables finding similar data [closed]
I have two tables in MySQL. Table 1 contains much data, but Table 2 contains huge data.
Here's the code I implement using Python
import MySQLdb
db = MySQLdb.connect(host = "localhost", user = ...
-1
votes
2answers
57 views
How to do division from select statements in sql server?
I am trying to create a select statement that can return a table of 1 column.
Basically, I am looping through all the records of NewHire, and then using its id, to select stuff from another table. I ...
-1
votes
1answer
32 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 ...
0
votes
2answers
57 views
Running a query within a scheduled job
I am looking at running the following query within a scheduled job weekly:
Select TOP 10
s.database_name,
m.physical_device_name,
CAST(DATEDIFF(second, ...
0
votes
0answers
78 views
how to find similar word with more similarities
how to Find words with length less than or equal...
declare @inp nvarchar(max),@data nvarchar(max)
set @inp='You can dance, you can jive, having .... jove... jve, ...'
set @data = 'jeve'
...
-5
votes
0answers
45 views
Query for Oracle database [closed]
I have a problem in writing a Database Query
Problem: I have the below fields in my table Fields: Primary_ID(PK) ,E_ID, Bank, REQUEST_STATUS, START_DATE, STATUS
Data: REQUEST_STATUS may contains ...
-4
votes
0answers
42 views
oracle database query [closed]
I have a problem in writing a Database Query
Problem: I have the below fields in my table Fields: Primary_ID(PK) ,E_ID, Bank, REQUEST_STATUS, START_DATE, STATUS
Data: REQUEST_STATUS may contains ...
0
votes
2answers
93 views
Indexing a longtext field
I would like to run an index on a longtext field using:
CREATE INDEX post_meta ON wp_postmeta (meta_value(8));
There are currently ~1 million records.
Questions:
Will creating this index affect ...
1
vote
1answer
24 views
Moving postgresql data directory
I moved postgresql's data directory by following the following steps:
Stop postgres
cp -a source_data_directory destination_data_directory
export PGDATA=destination_data_directory
Changing data ...
0
votes
1answer
12 views
content types of insertion
I have a CSV file that contains a lot of integer values. Is it better to insert these individual values in bulk as in a full transaction or should I be inserting the CSV file itself into the MySQL?
1
vote
0answers
27 views
How to Change location of postgres cluster and database within the same machine? [duplicate]
I have my present database cluster of postgres at /mnt/my_hard_drive which I want to change to /home/myfolder. I also want to move all my databases present in the present cluster to /home/myfolder. Is ...
1
vote
1answer
55 views
Custom sp_who/sp_whoUsers
I need to allow a client in a dev DW SQL 2K8R2 environment, to view and kill processes, but I do not want to grant VIEW SERVER STATE to this person (he's a former sql dba and is considered a potential ...
13
votes
1answer
535 views
Sql Anywhere 11: Restoring incremental backup failure
We want to create remote incremental backups after a full backup. This will allow us to restore in the event of a failure and bring up another machine with as close to real time backups as possible ...
0
votes
2answers
154 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 ...
