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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15
votes
2answers
1k views

T-SQL query using completely different plan depending on number of rows I'm updating

I have a SQL UPDATE statement with a "TOP (X)" clause, and the row I'm updating values in has about 4 billion rows. When I use "TOP (10)", I get one execution plan that executes almost instantly, but ...
3
votes
1answer
273 views

All-or-none exclusive lock on 2 SQL tables

My simplistic testing suggested that I can acquire an exclusive lock on 2 tables or postpone acquiring the lock on either until both can be acquired at once by using a query like this: SELECT ...
5
votes
4answers
2k views

Script to generate insert statements

I am trying to write an SQL script to create an insert statement for each row of table TEST which has field A (int) and field B varchar(30), in my MS SQL database. I would like to save those insert ...
-8
votes
1answer
288 views

What are the edges of typical (or specific) paid databases like oracle of mysql compared to the free oness? [closed]

Note: I am building a startup. I am currently using mysql. I am pretty much stuck. Others recommend other free databases like mongodb. I am seriously considering paid one IF and only IF it gets better ...
-1
votes
1answer
999 views

What exactly is SOLR? [closed]

It seems like a magical technology that can Do spatial search do full text search The problem is, It doesn't say where does it store all the data. Does it have it's own proprietary database If it ...
8
votes
3answers
3k views

Oracle: How do I query a Hierarchical table?

Background This is for the construction of some views we'll be using for reporting. I have an table of locations, the key fields being "location" and "parent". The structure that these two fields ...
4
votes
1answer
181 views

Parameter sniffing work arounds

I have used two methods to get around parameter sniffing issues in the past: 1) Use WITH RECOMPILE 2) Reassign parameter values to local variables and use those instead of the parameters From what ...
3
votes
1answer
858 views

Can I Rebuild indexes in a DB except for one table?

I have a table in my database that is constantly monitored by an application server for changes. Unfortunately rebuilding the indexes connected with this table breaks the app server's connection. This ...
2
votes
2answers
443 views

How to get SQLCMD to output errors and warnings only?

How can you get SQLCMD, when executing a SQL script file, to just output any errors or warnings it encounters? I essentially dont want information based messages to be output.
0
votes
1answer
1k views

Access 2007 sql editor

Is there an ACCESS 2007 JET SQL editor or client (not sure the right term is) that can be used to code Access Jet SQL queries? It is very difficult to write SQL queries in ACCESS 2007 since it's like ...
0
votes
2answers
104 views

SQL and Multiple Indexes

Consider the following table: i | a | b | c -------------- 0 | 1 | 2 | 3 1 | 4 | 5 | 6 2 | 7 | 8 | 9 3 | x | y | z The table, in the end, will have several thousand rows, and even more columns then ...
3
votes
3answers
2k views

SQL Server dates - can I get date and hour?

In SQL Server, can I do the equivalent of to_char(date_field, 'YYYY-MM-DD:HH24') in Oracle to get 2012-01-30:23?
0
votes
1answer
892 views

Select DISTINCT records with extra information

I have a MS Access database full of customer names and addresses. I want to send out a mailing but only one per address. Therefore if there are 3 different customers at the address I want only one ...
1
vote
1answer
173 views

How to interpret explain sql?

SELECT DISTINCT TB.ID, TB.Latitude, TB.Longitude, 111151.293413 * SQRT( pow( - 6.185 - TB.Latitude, 2 ) + pow( 106.773 - TB.Longitude, 2 ) * 0.988392289802 ) AS Distance FROM `tablebusiness` AS TB ...
0
votes
2answers
2k views

Is it possible to join derived tables to actual in Access 2007

Is it possible to join derived tables to actual tables in Access 2007 like in SQL Server 2008? I have an example below: SELECT * FROM --MyOtherTable is a "real" table MyOtherTable ...
2
votes
2answers
2k views

CREATE INDEX for long columns

I am looking for alternative to create index on long column: create table line ( field_key integer not null, value varchar(4000), ... ); create index key_value_idx on line ...
8
votes
3answers
5k views

When should indexes be dropped and recreated?

We are constructing a data warehouse that initially will be 1 TB and will grow around 20gigs every month. For certain tables we are doing daily ETL processes and others we are doing weekly/monthly. ...
1
vote
0answers
989 views

SQL query optimization in Prestashop e-Commerce solution

I'm working on a layered navigation module within Prestashop e-Commerce solution. I'm trying to optimize a SQL query which creates a temp table during execution. I think this is creating a ...
1
vote
1answer
98 views

Is it possible to query “NOT IN” in NO SQL?

I asked the same thing about a specific NoSql engine (Big Table) on SO. It seems that Big Table doesn't support NOT IN queries? Is that possible in any other NoSQL databases? Will it ever be possible ...
0
votes
2answers
3k views

How to manage a huge database?

We are building a service witch require a huge database. We are actually planning on getting more than 100 millions rows in our biggest table. So, what are the best options to store all this data in ...
1
vote
1answer
2k views

Really slow DISTINCT ON query with multiple joins

Originally posted: http://stackoverflow.com/questions/11173717/expensive-query-on-select-distinct-with-multiple-inner-join-in-postgres The songs table has only about 4k rows, posts and stations have ...
-5
votes
2answers
2k views

Rounding of to nearest 10 rupee in SQL Server [closed]

I want round the amount to nearest rupee. I.e. if I got 225 as amount it must be treat as 230. And if 224 it must treat as 220. How can it be done using roundoff in T-SQL?
2
votes
1answer
563 views

How to avoid duplicating information in a series of nested SELECT statements?

I'm working on an SQL query that puts together customer history based on past purchases (the industry is venue ticketing). The report will be LARGE, something like 80-90 columns, with one column per ...
-4
votes
1answer
4k views

primary key, foreign key relationship between the department and employee tables How do I install? (sql_developer) [closed]

EMPLOYEES TABLE COLUMN NAMES: EMPLOYEE_ID EMPLOYEE_NAME EMPLOYEE_LASTNAME JOB EMPLOYEE_BUSINESS_PHONE EMPLOYEE_GSM SALARY HIRE_DATE E_MAIL DEPARTMAN_NO NOTE:FOR THIS TABLE: EMPLOYEE_ID IS PRIMARY ...
8
votes
5answers
3k views

Why is the SELECT clause listed first? [closed]

I'm not sure if this question is on-topic - if not, feel free to close. Also, if it'd be a better question for another StackExchange site, I can ask it elsewhere. I was wondering why SQL places the ...
1
vote
1answer
535 views

Return a percentage of the full record set

I'm pulling back a list of orders but I need to only display a percentage of the records. for example we want the top 30 or top 50. The percentagbe is variable so I'd like to not use TOP. I tried ...
5
votes
2answers
1k views

Slow ORDER BY with LIMIT

I have this query: SELECT * FROM location WHERE to_tsvector('simple',unaccent2("city")) @@ to_tsquery('simple',unaccent2('wroclaw')) order by displaycount I'm happy with it: "Sort ...
0
votes
1answer
57 views

2 Very similar queries return different number of result (one is null)

I want to find businesses near a point that contain a word that start with sea lat=-6.185068&long=106.773121&keyword=sea&distance=5000&startfrom=0&howmany=20&prominent=5 ...
-2
votes
1answer
3k views

Why does MATCH (FullTextSearch) AGAINST ('*' IN BOOLEAN MODE) return nothing?

MATCH (FullTextSearch) AGAINST ('k*' IN BOOLEAN MODE) return something Namely anything with a word that start with k MATCH (FullTextSearch) AGAINST ('ku*' IN BOOLEAN MODE) return less MATCH ...
5
votes
2answers
585 views

SQL to select random mix of rows fairly

Here's my problem: I have a set of tables in a database populated with data from a client that contains product information. In addition to the basic product information, there is also information ...
0
votes
1answer
284 views

MySQL Partition based on month-year

Is there a way that I can create a month-year partition on the below table? Without having to define all the permuations of month/year combos ? CREATE TABLE visitor_visits ( id int(10) UNSIGNED ...
2
votes
0answers
505 views

SQL Developer Data Modeller and Data Dictionary question

I'm not a DBA but I am a (mostly!) competent SQL report writer. Can I trouble you DBAs for some pro-knowledge, please? I can connect SQL Developer to Oracle XE's data dictionary without any problem, ...
6
votes
4answers
3k views

Passing in the table into a stored procedure

Is it possible to pass in the name of a table into a stored procedure? For example, suppose you have several views of the same table. They all have the exact same structure. You want a store ...
0
votes
2answers
123 views

Very slow request with small difference

I use sqlite3 on a Mac Mini. I'm a Java and Web programmer, with some SQL experience, not as much as an expert. I have three requests. First and second are fast (0.2s), and the third is very slow ...
3
votes
1answer
759 views

Best Approach for Mirroring Data from SQL Server to MySQL

I need help in regards to replicating data from a third party point-of-sale system with a SQL Server backend to a MySQL DB. Specifically, can anyone suggest a best way to mirror data from SQL ...
3
votes
1answer
304 views

Microsoft SQL Server 2008 R2 Developer Edition Data Tuning Advisor tool

I have Microsoft SQL Server 2008 R2 Developer Edition installed on my machine which has Win7 64 bit OS. I am not able see Data Tuning Advisor tool in my SSMS. Before this installation my machine ...
18
votes
3answers
7k views

Running total with count?

As the title suggests I need some help getting a running total in T-SQL. The problem is that the sum I need to do is the sum of a count: sum(count (distinct (customers))) Say if I ran the count ...
1
vote
2answers
2k views

Unable to connect SQL Server 2008 from SQL Server 2005 DB

I have SQL Server 2005 on my work station and on my Server, we have SQL Server 2008. When I tried to connect to SQL Server 2008 from my SQL Server 2005 edition, I am receiving the following error: ...
1
vote
2answers
242 views

SQL Trigger to verify account, if not verified dont process stored procedure/transactions

Is there a way to create a trigger or function to check a user against the database and if not verfied, the following stored procedure is not ran. I would like this option for verification check ...
3
votes
1answer
1k views

Script to Restore/Create SQL Server 2000 Database from Another Database's Backup

I'm trying to create a database, NewClientDB, by restoring another database's, OldClientDB, backup, d:...oldclientdb.bak. I've always done this via SQL 2000 Enterprise Manager, but the GUI keeps ...
3
votes
3answers
575 views

This query is choking the server. How can I improve it?

Following query is hogging a lot of resources, as much as that the queries are getting locked down & CPU usage goes through the roof! The MySQL Processes list shows that as the number of requests ...
2
votes
2answers
653 views

Design best practices for last tracking with indexed view

My tables structure is below : TbDoc (ID int , ...) TbDocActions( ID Int, DocID Int, Date DateTime, col1 int, col2 int, ...) I want to have indexed view to get last TbDocActions columns for ...
3
votes
1answer
2k views

Create view in a different database with dynamic SQL

As part of a larger project I'm trying to create a new view on each database in a SQL Server instance. I've created a stored procedure that among other things is looping through the databases in ...
3
votes
3answers
2k views

Restore one table from SQL Server data file (.mdf)

I stupidly deleted most of the contents of a table in my database. I have a backup of the server which has the .mdf on it. I assume I can make a new db and attach the backup .mdf. Then I can select ...
7
votes
1answer
615 views

computed columns, index, clustered index and covering index?

We all know the we can only have one clustered view per table, cool. But apparently you don't have values of computed columns on leaf even when using a clustered index and they are computed each time. ...
7
votes
3answers
2k views

SQL Server 2008 R2 High CPU

We are having a SQL Server R2 Web Edition database, based on Windows Server 2008 R2 with a strong CPU and 32GB RAM DDR3. Our database works very hard (we run around 600,000 queries in 1 minute) and ...
2
votes
3answers
28k views

SQL Server 2008 R2 High memory usage

I have SQL Server 2008 R2 that runs multiple jobs over night, the problem is SQL Server will eat up all RAM and CPU, then it will not release the RAM resources after the job finishes, as a workaround ...
1
vote
1answer
145 views

Thought CTEs were syntactic sugar

I was asked to test a change to a query, moving a Table Valued Function (TVF) into a CTE (non-recursive). My understanding was that each CTE reference is executed separately, so there was a ...
2
votes
1answer
640 views

Change in datatype?

I have a table on which rows are inserted on hourly basis. The row contains id, installation, product_id and hit_allowed. all of them were mediumint in the beginning. but few days back id reached it ...
3
votes
2answers
842 views

Restore a Database into a Current Database and merge

I want to know how, or if it is possible, to backup a database then should the user wish, restore that database at a later date and merge it with the one they are currently using. Both Databases will ...