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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2answers
11 views

How many passes of a table are done with UNION ALL?

I am trying to run a single query that will make a single pass through a table, and was wondering if by using UNION ALL to make counts of total row unioned with counts of unique rows so I would be ...
4
votes
1answer
147 views

Is this a sane model for a network provisioning system?

I'm sketching out a model for a network setup, where I have the following conditions: There are multiple nodes which contains a number of switches each. Each switch has multiple services, which may ...
0
votes
2answers
3k views

Optimize IN clause in where query with order by - MySQL

I am trying to optimize a query that using IN clause in WHERE to avoid file sorting. To make it easy , I created the following sample which shows the problem. Here is my query: SELECT * FROM `test` ...
0
votes
1answer
135 views

How to merge two databases, both with primary keys

I have two databases, both with the same tables, but the data is out of sync. I need to add data from database A to database B, but not overwrite any data in B that exists in A, instead add it with a ...
2
votes
1answer
126 views

Should database be denormalized if I need an index across multiple tables

I have a catalog of album and song names. The song has a foreign key to the album table. I expect queries like: SELECT * FROM song s JOIN album a ON a.id = s.album_id WHERE LOWER(CONCAT_WS(' ', ...
1
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2answers
19 views

MYSQL find if a default value has been set for a table (DateTime Specifically)

I am trying to internationalize a database, but there are places where the timestamp that gets set is using NOW() instead of UTC_TIMESTAMP(), and it's using Amazon's RDS with multiple MySQL servers. ...
2
votes
1answer
21 views

How to write a query that counts rows by date?

I have a database named emp1. There is a table named tx_feeder. I want to get the count of rows from that table. I have used the following query to get the data of single day, select count (*) ...
1
vote
1answer
48 views

Minimum value on most recent date per account MS ACCESS SQL

I have a MS ACCESS DB table Riskscore with the three fields: CHACCTBS, CHRQDATE, CHSCORE and want to find the lowest CHSCORE on the most recent CHRQDATE per CHACCTBS where it is possible to have ...
0
votes
0answers
18 views

Creating a trigger to update field in 1 table based on values in another table using data in multiple rows

I'm new at SQL and need to create 2 triggers between 2 tables. Table 1 has the following columns: tbl1.ContractID char(6) tbl1.ContractFulfilled char(1) Table 2 has the following columns: ...
3
votes
5answers
5k views

How to get the total days per month between two dates?

Given two dates like 20120302 and 20120605 I need to get a list of Months and the total days in those months that fall between those two dates, like so: March 28 April 30 May 31 June 03
-1
votes
1answer
17 views

T-SQL Trying to create a trigger that uses joins across 2 server instances [on hold]

I am trying to complete a trigger on 2 instances of SQL Server. I am running MS Dynamics ERP set CRM & GP. I need to remove data from one server once an update happens to another table. I have ...
-1
votes
0answers
42 views

Design for fast database query over millions of rows [on hold]

I want to query in a database like : Let us consider a student table with the following attributes: (Id, Age, CGPA, Address, Gender). Our table contains record for all the student in the world (so my ...
0
votes
1answer
169 views

MySQL-How to find that value in a column is subset with all other values in same column multiple time

I have a table named as Team where table contain 3 column (ID,Team,Task). Its datatypes are (INT,VARCHAR(255),INT). Below you will find a sample table where I would like to perform the query on column ...
0
votes
0answers
26 views

Update Table Query: Automatically handle “Enter Parameter Value” prompts?

I'm trying to create a single, Update Query in Access 2007 that does all of these 3 things: Update (skipping zero-length values) Append Automatically handle missing Fields without showing any "Enter ...
1
vote
0answers
124 views

Generally unsolvable problem? How to ORDER BY aggregated columns GROUPED BY many possible columns very fast?

Is there general solution or some best practises or at least some vague hint, how to solve following problem (general, but concretised in following example)? I think this must have been solved many ...
0
votes
3answers
243 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 ...
2
votes
4answers
99 views

Finding all date ranges that overlap a target date range

Say I wish to store when staff are on holiday (FromDate, ToDate) and then I wish to find all staff that are on holiday between two given dates (QFromDate, QToDate). Now assume that I have many such ...
1
vote
1answer
28 views

Modulo operator with nonintegers - unexpected results

MySQL 5.5.32, Oracle 11g MySQL returns strange results for queries involving mod() with noninteger moduli. Why is this? I have a column defined thus: ...
2
votes
2answers
34 views

Ensure only one of the several records for a given item has a column with true value

I have a table called Computer with columns: id NIC_name is_primary My primary key is (id, NIC_name) and is_primary is a bit field for a boolean value. I would like to ensure that for all ...
0
votes
0answers
27 views

INSERT INTO SELECT causing data to double

I have strange issue. I am working in a Teradata database. In a procedure I am populating a main table by processing data via multiple intermediate tables. But in the end only one table is populating ...
9
votes
2answers
16k views

SQL Server backup failing. Error: 3041, Severity: 16, State: 1

First of all, I'm very new at stackexchange, so please bear with me. I'm running a SQL Server 9.0.4060. My problem is: my SQL Server backup keeps failing on a lot of the databases. The Maintenance ...
0
votes
1answer
100 views

Automate SQL Server restore from Prod to Dev

I would like to setup an automated restore job which takes the latest timestamp .bak file and restores it into the DEV instance. I currently have a job on the DEV box that uses the UNC path to the ...
1
vote
1answer
41 views

How to optimize the sort in Postgres query

I've been trying to optimize the sort in the following query. I ran EXPLAIN ANALYZE and the majority of the time is during the sort when it arranges the output by distance. I've tried converting the ...
1
vote
1answer
19 views

SQL Server restore database file access error

I am trying to restore a database from a file on a remote machine. The script I am using is as follows: RESTORE FILELISTONLY FROM disk = '\\server\path\to\file.dmp' RESTORE DATABASE MyDB FROM ...
0
votes
1answer
23 views

inner join on true

My table: abc +--------+ | letter | +--------+ | a | | b | +--------+ Query: SELECT * FROM abc t1 INNER JOIN abc t2 ON true Result: +--------+--------+ | letter | letter | ...
1
vote
1answer
14 views

Address Windowing Extensions Overhead

I just found another SQL Server (2008r2) with AWE enabled on a 64-bit OS/SQL combination. Has anyone done an research as to the overhead created by enabling AWE on the 64-bit OS/SQL combination? It ...
2
votes
1answer
44 views

Row with latest timestamp

How to get the row with the latest value in a TIMESTAMPZ column? Is an index needed? Does an index change the strategy? Would behavior vary by database (I'm using Postgres 9.4)? My app records data ...
-4
votes
0answers
22 views

what is update cascading exactly in sql? [on hold]

We have three table declarations for P1(A), Q1(B) and R1(C) with referential integrity in SQL. create table P1 (A primary key); create table Q1 (B primary key references P1(A) on update ...
0
votes
1answer
23 views

Virtualized SQL Server Memory Oddity

I've not seen this before, though perhaps it is common. I am looking at a virtualized (VMWare 5.5) SQL Server (2008R2 on Windows 2008 R2). What I am seeing is that in Task Manager, sqlserver.exe is ...
1
vote
3answers
58 views

SSIS: How to check if a record DOESN'T exist in flat file but exists on the database

I am working on preparing an SSIS job where I am importing a .CVSV file to OLE DB destination (sql database). We are going to get these files on daily basis. The .CSV file contains records of doctors. ...
5
votes
1answer
51 views

Find rows where integer sequence contains a given subsequence

Problem Note: I refer to the mathematical sequences, not the sequences mechanism of PostgreSQL. I have a table representing sequences of integers. The definition are: CREATE TABLE sequences ( id ...
0
votes
3answers
82 views

SSIS - Best way to insert large number of rows

So here's the scenario: I have an XML file, which is in size of 500GB, and with data of around 600 million rows (once on a database table). I'm using SSIS for the operation, and since it consumes a ...
-1
votes
0answers
32 views

Select query for finding jobs started at same time

I have a 'Job_Status' table with 3 columns: Job_ID (numeric) Job_Time (datetime) Machine_ID (numeric) At a regular interval (1 min), entries are inserted in the above table for the Jobs running on ...
0
votes
1answer
193 views

SQL Query - Possibly the most poorly written query in the history of mankind

Having a major headache trying to tune this query and looking for help, a programmer who had no idea what they were doing messed with this query and it is currently being used in production and it ...
1
vote
1answer
105 views

Date format on the output of cmdshell dir C:\ /TC

I would like to ask you guys if anyone of you had this trouble before. In SQL I read the create time of the file like exec master.dbo.xp_cmdshell 'dir C:\ /TC' which gives me; 07/14/2009 04:20 ...
1
vote
1answer
25 views

MySQL Matching records across tables discrepancies

I have a database called match, within this database I have a number of tables. Of which in particular I need to marry up two datasets in different tables to identify email addresses that are not ...
1
vote
1answer
656 views

Tree structure hierarchical query sorting

I have the following structure of table. CREATE TABLE table1 ( serial_num integer NOT NULL, parent_num integer, parent_key text, key_ary_num integer[], level integer, rank integer, ...
0
votes
1answer
111 views

Display a one-to-many relationship in one row

I have a "one to many" relationship in two tables: Table "products" contains: product_id, product_descr Table "packing" contains: product_id, package_id, package_desc One product has often more ...
0
votes
0answers
16 views

Selecting the correct database engine [on hold]

I am looking for a database engine/system that will allow me to do the following things: Query in SQL Use key-value store or document-store I am trying to setup an intentionally vulnerable server ...
0
votes
1answer
261 views

SSIS Dataflow Task issue, moving data from SQL Server 2008 to MySQL via ADO.Net

Can you please help me in getting this problem solved.. I'm trying to build a SSIS package where I'm moving the data from SQL Server 2008 to MySQL. However I'm getting a weird problem in dataflow ...
3
votes
5answers
528 views

Can I combine the results from multiple columns into a single column without UNION?

I have a table with several columns which I want to SELECT: SELECT his_name , her_name, other_name FROM foo; Bu, I instead I want to combine the results all into a single column. As an example, I ...
1
vote
3answers
24 views

Access Query Design View: Show results in two columns from one table

Lets say I have the follow Tables: Outfits: ID | Top Color ID | Bottom Color ID 1,2,1 2,3,4 Colors: ID | Name 1, Red 2, Blue 3, Green 4, Orange I'd like to have a query in design view to have the ...
0
votes
0answers
30 views

Correction of a complex query [on hold]

I don't know if this question is appropriate on this forum. I have a huge query : SELECT threshold.id, brand.id, COUNT(brand.id), threshold FROM current_stock, article, product, brand, delivery, ...
-1
votes
0answers
20 views

Modifying a query for the UPSERT command [on hold]

Here is the current query select pt.name, slr.name from stock_route_product srp inner join product_template pt on srp.product_id = pt.id inner join stock_location_route slr on srp.route_id = slr.id ...
2
votes
4answers
5k views

How to find all positions of a string within another string

How can I find all the positions with patindex in a table or variable? declare @name nvarchar(max) set @name ='ali reza dar yek shabe barani ba yek ' + 'dokhtare khoshkel be disco raft va ali ...
1
vote
0answers
43 views

MySQL Get first and last day of multiple records

I have a table HC_RSPI_data: | RADIO_TYPE | HOP | TOWARDS | RSPI | TP_NAME | DATE_TIME_END | TIME_LENGTH | RLTM_min | RLTM_max | ...
0
votes
1answer
15 views

Replicate update statement as Insert in Mysql 5.6

I want to replicate all update statement from Master as a Insert at slave end. 1. Is it possible like in SQL Server ? 2 If so , how ? I want to do it because , if any record on master is ...
1
vote
3answers
189 views

How to get the first or last row in ordered result set, depending by column value?

I have the follwoing result set from the table PUNCHREPORT EMPLID Name PUNCHDATE PUNCHTIME DEVICETYPE .................................................................. 70 ...
0
votes
1answer
112 views

SSRS Domain Migration

My company is currently going through a data center migration. We are now down to the SQL Servers and this includes SSRS. The bad thing that is going to hit us is the current SSRS server is being ...
1
vote
0answers
29 views

Why does my query search datetime not match?

select * from A where posted_date >= '2015-07-27 00:00:00.000' and posted_date <= '2015-07-27 23:59:59.999' But the result contains a record that has posted_date today: 2015-07-28. My ...