3
votes
5answers
958 views

SQL Query with ODBC, Joins and Group Bys

I am having issues with the statement below. The main purpose of the query is to pull a list of customers into an Access db from ODBC (our customers are stored in DB2 on IBM i). The query is ...
2
votes
2answers
447 views

SQL Server and Over-Indexing Tables [duplicate]

Possible Duplicate: Where can I find some guidance on index strategies? I remember taking a course on SQL Server 2000, and the instructor said that you have to be careful of adding too many ...
4
votes
2answers
12k views

How can I time-stamp data in MongoDB?

I'm responsible for writing an app to juggle a huge amount of client and business intelligence information. This information involves records for various businesses and metrics like revenue, their web ...
3
votes
1answer
314 views

which one is more efficient query?

I have a table called STUDENT +-----------+-----------+-----------+---------------+ | StudentID | FirstName | LastName | EnrollmenDate | +-----------+-----------+-----------+---------------+ | ...
13
votes
3answers
16k views

What can cause a mirroring session to timeout then failover? SQL Server 2005

We have two production SQL Servers running SQL Server 2005 SP4 with cumulative update 3. Both servers run on physical machines that are identical. DELL PowerEdge R815 with 4 x 12 core CPUs and 512GB ...
3
votes
2answers
940 views

SQL Server 2005: Full-text search space requirements

Is there a way to calculate the physical drive space required for a full-text search catalog? Space is cheap, but I'd like to know what I'm getting into. I'm looking at a table of about 200 articles ...
2
votes
0answers
216 views

Get all comment.message, status.message, users.* and profiles.* where users.user_id exists in friend.friend_id or friend.user_id

I need some help building this query because it's a bit complicated at least for me. I need to get all comment.message, status.message, users.* and profiles.* where users.user_id exists in ...
2
votes
0answers
160 views

Fulltext Index ranking combined with ranking used by Window's file indexing service [closed]

We have a list of records contained within a MS SQL database table, we have enabled "Full Text Indexing" on the table. Also, we have set up Window's file indexing service and added a catalog ...
2
votes
2answers
687 views

SQL Replication Commands

I'm trying to figure out how i can get the number of commands over the last day for a sql server replication. Transactional / Snapshot / Merge. I really want to be able to calculate the average ...
7
votes
1answer
5k views

SQL Server Job History Disappears After 5 Days

I feel like this is a silly question but for the life of me, I can't track down what is going on. I have just taken over administration of several servers and on all of them, the job history is being ...
1
vote
1answer
64 views

SQL Server 2005: Full-text search catalog design

I'm new to full-text searches, and am curious about how to properly design the full-text catalogs. I have an "articles" table. I would like to do full-text search on both the "title" and the "body" ...
2
votes
1answer
2k views

SQL Server 2005: Full-text search, order by matches

Is it possible to do a full-text search in SQL Server 2005, ordering on the number of matches? For example, let's say I have the following products for sale. Tennis Racquets Tennis Balls Footballs ...
5
votes
4answers
2k views

Speeding up COUNT(*) - WHERE clause slowing query

The following query takes 497 ms to run, if I remove the AND portion onwards it only takes 320 ms. Is there any way to speed this up? The only indexes I have on 'messages' table is a PK on ...
8
votes
4answers
5k views

Checking if 2 tables ( on different servers ) have the same exact data

So it seems that the company who is hosting our SQL Servers has been having some trouble with the replication from the production server to the backup server... I believe some of the tables have been ...
7
votes
2answers
8k views

SQL Server EXECUTE AS trouble

I'm missing something while trying to make my stored procedure use EXECUTE AS. The stored procedure is reading data from source_db, aggregates it and stores result in target_db. The sp itself is in ...
0
votes
3answers
4k views

INNER JOIN making COUNT(*) slow

I have a very simple query: SELECT COUNT(*) FROM messages INNER JOIN users ON messages.user_id = users.user_id With the join it takes 1146 ms and without it takes 220 ms (220 ms still seems slow to ...
2
votes
1answer
6k views

SQL Server 2008 - Run the Check Database Integrity Task with the PHYSICAL_ONLY option?

As part of our nightly maintenance, we include the Check Database Integrity Task which is an encapsulation of the DBCC CHECKDB command. It's beginning to take a considerable amount of time due to the ...
1
vote
1answer
242 views

What is a good way to query data stored in multiple identical tables split by date/time

I have a 3rd party piece of software which records data samples from industrial equipment. This data logging software stores data in sample data tables with approximately one day's worth of samples ...
1
vote
1answer
317 views

How to do a simple SELECT/UPDATE/DELETE performance test?

I have a table which might be causing excessive delays during insertion of new records. I'd like to run a test against the database, measuring how long it takes to select, insert, and delete from the ...
1
vote
1answer
2k views

How to truncate all tables with a specific name in all databases

I want to delete all tables named error_log in all of my databases that have such a table. truncate table error_log I am using SQL Server 2000.
1
vote
2answers
218 views

Is possible to optimize this query or it's already optimized?

I've three tables: default_users, default_profiles, default_friend. This are the SQL for each one: -- -- Table structure for table `default_users` -- CREATE TABLE IF NOT EXISTS `default_users` ( ...
3
votes
1answer
2k views

SQL Server : reasons not to use default database settings for ANSI_NULLS?

I've been given a case where a customer is experiencing this error - once in a while: Msg 8624, Level 16, State 21, Line 1 Internal Query Processor Error: The query processor could not produce ...
64
votes
3answers
133k views

How do I list all columns for a specified table

I'm looking for a precise piece of information in a database which I have no knowledge about. It's a 3rd party product, they are slow on answering some questions, and I know the data is lying inside ...
4
votes
1answer
656 views

SQL Server Replication :: Dedicated Distributor Hardware Requirements

Does anyone know any rules of thumb (or better) with regards to hardware requirements for a dedicated distributor server? i.e. Based on estimate metrics (e.g. number of subscribers, publishers, ...
7
votes
1answer
4k views

Should I restart the instance after adjusting Memory Allocation and MAXDOP?

As far as I know adjusting Maximum server memory and Max Degree of Parallelism does not require the instance to be restarted. Will new settings always come into effect without restart?
2
votes
1answer
2k views

How to copy bytea from Postgres to Oracle

I have a db on Postgres 9.1. The db collected some binary data that are stored in bytea file. I need to copy the data to Oracle 10g. How to do it? The details I have a table plines in Postgres9.1. ...
3
votes
3answers
2k views

CROSS JOIN with temp table and CASE statement

I'm trying to CROSS JOIN a table with a view. Here is my code: SELECT * FROM ( SELECT * , CASE TypeId WHEN 1 THEN InGs828S WHEN ...
0
votes
2answers
396 views

Transfer data from database1 to database2 using task queue

We have a SQL Server legacy database, db1, to put data of Project1. With change of certain tables(insert/update) in db1, we need to transfer the changes in another postgres database, db2 (used by ...
5
votes
4answers
702 views

Recommendation for free event monitoring software

I'm seeking recommendations for free / open event monitoring tools. HPOV costs continue to multiply like so many wet gremlins, and we've had enough. There are some interesting suggestions in this ...
1
vote
2answers
3k views

Using SQL Profiler on SSIS package

Is it possible to use SQL Server Profiler to trace a running SSIS package? I tried to do that, but all I can see in the trace is executing dp_sqlagent_... and the other internal commands! None of the ...
2
votes
1answer
1k views

query generate the information one column in two columns in one query

I have a question related with a query in sql. I have the next table: id name 1 name1 2 country1 3 name2 4 country2 I need to call the results so: ...
7
votes
1answer
8k views

OPTION FORCE ORDER improves performance until rows are deleted

I have a somewhat complex SQL Server 2008 query (about 200 lines of fairly dense SQL) that wasn't performing as I needed it. Over time, performance dropped from about .5 seconds to about 2 seconds. ...
2
votes
3answers
355 views

designing multiple tables while eliminating duplication?

As I'm working on an educational website, I'm facing a problem with my database design scheme - I can't find the correct design that eliminates duplication in the tables I'm creating. What I'm trying ...
4
votes
2answers
926 views

Designing an aggregation schema

The only thing closest to what I'm developing is Facebook's activities log for users. So I figured if I could ask about how FB might possibly implement such a feature at the database layer, then it ...
2
votes
2answers
9k views

Oracle 11g r2 standard edition installation - set environment variable PATH and create tnsnames.ora

I have installed Oracle 11g R2 standard edition (server software, 2GB download from Oracle). I found that the 'Environment Variable PATH' has not been set. Which of these directory should I use for ...
5
votes
2answers
100 views

Per person weighted answers

Hi I'm new to database design but am trying to make sure I get things right first time so as not to pick up bad habits. My question is I have a set of people for which I want to record needs mapped to ...
2
votes
2answers
303 views

Writing to a DKNF database, but reading from a de-normalized table for performance?

Would the following approach be reasonable? The Goal: queries have to be relatively fast, but without the hassles incurred by writing to a de-normalized database. The Context: A database for ...
0
votes
2answers
111 views

Tiered permissions to generate conditional data access

I am working to improve the confidentiality and access level of the information presented within a program interface over top of a MySQL database. My goal is to create a two tier system: one based on ...
4
votes
2answers
3k views

mysql transaction vs lock

I have a question regarding MySQL locking and transaction management. My Question is ..does mysql takes lock on the the tuple/table on which I am doing select/update in a transaction ?
3
votes
3answers
3k views

Does the MySQL primary key affect the efficiency of a SELECT query?

Does the primary key serve any purposes apart from uniquely identifying a specific row? For example, a table with an autoincremented primary INT key could greatly aid in search due to the option of ...
3
votes
1answer
2k views

Is the SQLTRACE_FILE_BUFFER wait type documented? What does it indicate?

We run a background task on one of our servers which polls sys.dm_exec_requests for long-running queries, gathering diagnostic information when it finds them, including wait type. I'm seeing a number ...
2
votes
2answers
4k views

How can I delete duplicates records in a table efficiently

I know there are several options to delete duplicate rows, eg: ROWID Analytical fn's like Rank(), row_number() What would be the most efficient way?
7
votes
1answer
4k views

PostgreSQL schemas and search_path

I'm reading Oreilly's PostgreSQL: Up and Running, and in the section Organizing Your Database Using Schemas it says the search_path may be set at the database level: For example, if we wanted all ...
2
votes
2answers
644 views

UDF in check constraint — downside?

I have a table where all actions affect single rows (insert and update, no delete's but if there were, they would be individual as well). I'm considering using a UDF in a check constraint so I can ...
2
votes
3answers
4k views

Memory problems with MySQLWorkbench

I'm currently using MySQLWorkbench 5.2.40 on my PC (8GB rRM, Corei7). I have a table with almost 1.5 million records, which I need to visually look over. Surprisingly, the total size does not exceed ...
9
votes
1answer
2k views

Best way to re-import large amount of data with minimal downtime

I need to import about 500,000 records containing IP lookup (read-only reference) data about once a week (only three int/bigint cols). I don't really want to worry about merging the data with the ...
3
votes
1answer
409 views

How can I conditionally summarize multiple rows in Microsoft Access?

I have a table of data, in Microsoft Access 2003, listing multiple rows for each person. I want to conditionally summarize a subset of these rows for each person, for instance, if entry for columnA = ...
1
vote
2answers
3k views

Similar function NOWAIT in MySQL

Select for update nowait doesn't work in MySQL 5x (innodb). Is there any function like NOWAIT in MySQL?
0
votes
1answer
599 views

Creating a bar chart from datatable

I'm writing a console application that fetches data from database (SQL) and writes to an excel sheet. Now I want to add a chart in the workbook according to the datatable values. How can I create ...
3
votes
1answer
5k views

error 1118: row size too large. utf8 innodb

I have tried to find a solution guys, and I am guessing that someone has met this before. But I cannot get hits down below 5000... most of which don't match my question. Using MySQL 5.6 - windows ...

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