Structured Query Language (SQL). For questions about the language, not Microsoft SQL Server (tag sql-server).

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What is the “other miscellaneous information” in the Shared Global Area (oracle database)?

I'm studying Oracle database ,and it says here that the SGA contains these data structures : Database buffer cache Redo log buffer Shared pool Java pool Large pool (optional) Data dictionary cache ...
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1answer
2k views

How to delete from two tables same field name in single query?

Help me, I want to delete same filed name from two tables in single query, I Attached query but it's not working... DELETE PersonalTrainerMasterData ,PersonalTrainerCheckboxData FROM ...
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1answer
39 views

SQL Server: affect other transactions?

I'd be surprised if this existed, but will ask just in case. Is there some mechanism which would allow one transaction to affect another (outside) transaction? For example: BEGIN TRY BEGIN TRAN ...
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2answers
4k views

PostgreSQL using count() to determine percentages (cast issues)

I'm trying to run the following query to provide the % of records in my patients table that have a value entered in the refinst field. I keep getting a result of 0. select (count (refinst) / (select ...
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0answers
37 views

Avoid using SOQL/DML query statements in trigger

SELECT field1 FROM sObject WHERE field = 'Myconst' LIMIT 50000; I need to replace this field = 'const' by storing this const in a variable which suppose is: String constVar = 'Myconst'; SELECT ...
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1answer
1k views

What is a good/healthy mysql query execution time?

What is a good/healthy mysql query execution time? To my calculations: The site gets 1000 unique visitors per hr 10 page view for each unique visitor 5 minutes for each unique visitor ...
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3answers
1k views

Block user access to certain tables

DBMS allows the admin to grant table access to a user using something like: GRANT ALL ON mydb.mytbl1, mydb.mytbl2 TO 'someuser'@'somehost'; However, is it possible to grant all tables to a user and ...
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0answers
92 views

msdb 'backupset' log history

One of our production server‘s backup job is getting failed for one DB because of Low disk space when I looked into ‘physical_device_name’ column in ‘msdb.dbo.backupset’ to get the path of backups I ...
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1answer
242 views

Get data per Customer and per Date

How will I get the all the date even though there is no order between two dates? Sample Table OrderID | Date | CusID 33942 | 6-21-2014 | 6005 34059 | 6-20-2014 | 4003 53333 | ...
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0answers
207 views

Is it recommended to have redundant foreign key columns?

Imagine I have the models A, B, C e D, where A have many Bs, B have many Cs and C have manyDs: Without redundance A | id | ... | ------------ | ... | ... | B | id | a_id | ... | ...
2
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1answer
2k views

Changing Databases Dynamically using Variables [closed]

I want change into a database programatically using in code: DECLARE @SQL nvarchar(2000) DECLARE @DBName sysname SET @DBName= 'foo' SET @SQL = 'USE [' + @DBName + ']' select @SQL execute @SQL ...
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2answers
67 views

How to print ORDER wise using LEFT JOIN in SQL?

Below SQL query is not displaying ORDER wise. How can I fix it? SELECT TabTitle,A.ButtonName,A.CheckBoxName,B.SubCheckboxName FROM (Select * from PersonalTrainerCheckboxData where ...
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1answer
53 views

how to select column3 from rec1 value which is matched to column1 val in rec2

i am having following scenario : col1 col2 col3 10 2 13 13 4 14 14 5 15 15 6 16 form the above given table col3 value(13) in row1 is seen in col1 value(13) in ...
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7answers
4k views

Is polling the only way for updating app's data from a database?

An application needs to have data as more freshly updated from a database as possible. In such a case, is there any other way for getting the data, besides of a timer based requesting (polling) the ...
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2answers
72 views

Time elapsed Calculation

I need to calculated time elapsed for each user to perform his part in a transaction. The sequence is: 0 -1 - B2 or 0-B3 The table looks like the following: ...
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1answer
850 views

ORA-00907: missing right parenthesis on query with subqueries

I am getting ORA-00907: missing right parenthesis for the following query: SELECT PEOPLE.NAME FROM CLIENTS K INNER JOIN PEOPLE ON K.ID_L = PEOPLE.ID_L WHERE NOT EXISTS ( (SELECT DISTINCT ARTIST.ID_U ...
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2answers
176 views

Handling expiration in a course registration or ticketing system

I want to restructure the database for a web application I inherited for handling summer camp registrations, but my question is relevant to any event registration or ticketing system. My question is ...
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1answer
63 views

How to freeze a view in standard SQL? [closed]

I have the following: create view ONE as select ID workers_A; create view TWO as select ID workers_B; create view FINAL as (select * from ONE) UNION (select * from TWO); That works correctly, but ...
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0answers
40 views

How to aggregate similar columns inside a very long table? [duplicate]

I have quite a difficult problem that I don't have any idea how to approach it. I'll be glad to receive some advice. I have a very long table which contains details about a specific house residents. ...
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2answers
137 views

“GROUP BY” in ranges?

Suppose I have a table with a numeric column (lets call it "score"). I'd like to generate a table of counts, that shows how many times scores appeared in each range. For example: score range | ...
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0answers
120 views

Would an INNER JOIN query in a sharded relational database hit the same shard when using a compound primary key?

In this question I have asked about modulus calculation in sharded tables, this design is used: CREATE TABLE Orders (order_id INT PRIMARY KEY, ...); CREATE TABLE LineItems (order_id INT, lineitem_id ...
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0answers
14 views

Specific id to appear first in result of query [duplicate]

I have a sample query where: Select gID, entID, cID, gString From tblGF Where ((entID=$entID And cID=0) Or (entID=$entID And cID=$cID)) And (gFP='BB' Or gFP='CP' Or gFP='PS' Or gID=$gID) Order ...
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0answers
2k views

Installing SQL Server 2012 failed setup administrator

Can anyone tell me why this keeps failing? I am logged in as "Administrator" on Windows Server 2008 r2 I added Administrator to the "Backup ... " Group And I checked to make sure everything is as it ...
2
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0answers
74 views

Modulus calculation for compound primary keys in MySQL Cluster (and other sharded databases)

In MySQL Cluster, and generally in sharded databases, how is a compound primary key's modulus calculated? Say, for example, there are two tables that have primary keys like so: CREATE TABLE Orders ...
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2answers
347 views

My database has been deleted suddenly on the server how to recover it?

I'm running an application on windows server that connects to a SQL Server database. Today, when I opened SQL Server Management Studio, I was surprised the database is not in the list of the ...
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1answer
377 views

COUNT and GROUP BY performance

I have a table where I store visits (id, datetime, country, browser). I want to count how many visits are from which country. I use this query: SELECT country, COUNT(*) as hits FROM hits_table ...
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0answers
29 views

Indexed column INSERT vs. UPDATE

I have an indexed column. I could give it a value on INSERT. But it would be easier if I would add this value via UPDATE later (I have to update this row anyway). But I was thinking if it would be ...
2
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2answers
129 views

Get count of processed queries

I have been searching a while to find a way to retrieve the amount of queries my postgres database is processing and responding to. I found various statistics about disk I/O, insert/update statistics ...
0
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1answer
715 views

Join 3 tables returns too many results [closed]

I have 3 tables: users, posts, videos. The last 2 tables have user_id that associate with users.id (first table). The problem is that when I try to run inner join query and return all posts and ...
2
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1answer
4k views

Error Creating Foreign Key in Oracle

I have 2 tables: PRODUCTS PREFIX SUFFIX ATTR1 ATTR2 ----------------------------------------------------- 001 AAA 50 100 001 BBB 20 300 010 ...
1
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1answer
409 views

UPDATE not working properly with linked server

Please see a question I asked here earlier: http://stackoverflow.com/questions/24324823/update-not-working-properly-with-linked-server Dommer suggested using OPENQUERY and this does appear to resolve ...
0
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1answer
181 views

SQL query for all combinations without repetition

I need a function for calculating combinations without repetition from a list. Example: I have a list of names e.g. Tom Bob Paul Tina Now I need a list of 3 names out of the 4 without having a ...
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2answers
4k views

SQL as a Storage Definition Language (SDL)

In my Databases lecture, the teacher mentioned that SQL is not just a data definition language (DDL), data manipulation language (DML) and view definition language (VDL), but also a storage definition ...
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2answers
74 views

Making a Database Online [closed]

I am so confused with this issue, I have vb.net application and it has a sql database . Now, I want this application to access the sql server from anywhere , because there are many clients sharing ...
1
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1answer
396 views

Running queries directly on DB2 databases

Just have a general query, if it is really fine or safe to run long select queries on RDBMS production Databases specifically DB2? If NO, what are the major risks and issues in executing select ...
2
votes
1answer
745 views

Subselect dependent on first select value

I wish to do a select of all data matching a particular id. I would also like to return a selection of all data matching the alt_id field in the first select. This example works fine for the main ...
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0answers
96 views

Low performance oci_execute

I work with a PHP application that connects to an Oracle database. Sometimes, the PHP executes a large query from a large database the page loads for ages (more than 200s). But I've seen something ...
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0answers
221 views

Database Mail not sending

I'm trying to send email using the DatabaseMail on SQL Server 2008, I can see my emails sitting in the msdb.dbo.sysmail_unsentitems But they just sit there, I get no error messages. I've checked ...
1
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1answer
36 views

What is the generally accepted method and tools for profiling MySQL queries?

Profiling database queries is difficult, and dependent on database technology. In MySQL, what is the usual (or, in deference to that, a great) process for profiling a query? For example: Run the ...
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1answer
312 views

Select post and concatenating all categories it belongs to

I have 3 DB tables POSTS +----------+----------+----------+ | id | title | content | +----------+----------+----------+ CATEGORIES +----------+----------+ | id | title | ...
1
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1answer
394 views

Way to run SQLCMD without storing password in text format

Is there a way to run sqlcmd from a batch file where I don't want to store the password in plain text format. I have done some research and found the system variables method(store password in system ...
0
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1answer
36 views

selecting rows that have n foreign key conditions satisfied

I'm trying to filter a master table rows based on 2-more conditions from the relative foreign key relation, i came up with this which is working fine, but i just can't convince my self that it's that ...
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2answers
285 views

Disk write in iotop when doing mysql “Copy to tmp table”

I have just moved servers from a two-server configuration with the application and database server running separately to a one-server LAMP stack. Unfortunately the issue that I have encountered on ...
0
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1answer
76 views

Postgresql Function Trying to Insert into 1 row instead of 2

Postgresql 9.3, Mac OS X 10.6.7 I created this function and I would like to insert both results into the same row. Obviously the way I have it inserts into 2 rows. First, here is the Table T1: ...
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0answers
247 views

Stored procedure taking much longer than query [closed]

I have a simple code segment that runs in about 1 second when run alone, but more than 5 minutes when deployed as a stored procedure. I'm using sql server 2008. Unfortunately, I can't post the code ...
6
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2answers
9k views

SQL query slow-down from 1 second to 11 minutes - why?

Question: I'm porting the below query (listing tables by foreign key dependencies) to PostGreSql. WITH Fkeys AS ( SELECT DISTINCT OnTable = OnTable.name ,AgainstTable = ...
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1answer
158 views

How can I apply heuristics to optimise an expression tree?

I've converted the following SQL query: SELECT name FROM dog d, works_at w WHERE (d.owner_name = w.person_name) AND (w.kennal_name = "Breeders"); into the following expression tree: My main ...
3
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0answers
180 views

Using Import Wizard with Access - No null values

I am trying to import a table from Access to SSMS using the Import Wizard but when I do the resulting table has a lot of empty strings instead of the NULL values that I am expecting. How do I make ...
0
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1answer
65 views

two auto incrementing columns

OK I have hit an issue, now I was going to look at having two auto incrementing columns, but I cant using InnoDB. So I am after a Solution. I have a table called queue. Everything to do with my task ...
2
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2answers
269 views

Design of an application log database

We are generating logs like following example(this is a table no actual pipes): 2014-06-10 09:00:03.457 | Channel1 | Operation3 | Function15 | 15ms 2014-06-10 09:00:08.245 | Channel2 | Operation5 | ...