An acronym for "Structured Query Language" (it's not the name of a specific DBMS product), 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 ...

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1answer
141 views

Database Mirroring and Replication in SQL Server 2008 R2

I have configured the mirroring and replication between 4 servers (A,B,C,D).i.e, Mirroring between A to B and C to D, Replication between A and C. The configuration was a success and I am able test ...
0
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1answer
22 views

SQL Server database performance is very poor after a month of use

I am quite new to SQL server and have a question regarding database speed. The database (about 50 MB big) was very fast in the beginning. Now, a month later, the speed is a lot worse. I run a script ...
0
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5answers
66 views

Database with only text fields

I started working on an existing SQL Server Database System in which most of the fields are stored as text. Except some IDs all fields are varchar (phone numbers, zip codes, Dates, addresses, monetary ...
0
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1answer
38 views

Doing a insert across two databases with same collations and getting an error

SQL query : insert DB1.dbo.tbl1 select distinct Number, Name, 'Unknown', 'Unknown', 'Unknown', NULL, 'No', 'GL', 'N/A' from DB2.dbo.tbl1 T2 where T1.Number not in (select distinct AccountNumber ...
8
votes
3answers
9k views

How export a sql server 2008 diagram to PDF filetype?

I want to have a export from my database diagram to PDF or image types.How can I do this? I worked with sql server 2008 R2.
0
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1answer
39 views

Stored procedure takes 18 seconds on first load, 0 seconds on subsequent loads, waiting several minutes makes it slow again

I have a stored procedure that returns a lot of data for a business dashboard. On first load it takes 18 seconds, after that it takes 0 seconds, even if I change the input parameters at random it ...
14
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2answers
11k views

How to optimize a query that's running slow on Nested Loops (Inner Join)

TL;DR Since this question keeps getting views, I'll summarize it here so newcomers don't have to suffer the history: JOIN table t ON t.member = @value1 OR t.member = @value2 -- this is slow as hell ...
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2answers
66 views

Fourth inner join to the same table increases query duration significantly

As soon as I add a fourth inner join to a specific table, the query duration increases significantly: sub 1sec to 45sec. The table in question is deployments d4. The SQL Query: select a.id as ...
0
votes
3answers
36 views

how to order a field based on two parts of the row value

I have a field with contents of the form 22/4, 30/8, 30/5, 30/3 I want it ordered in the form 22/4, 30/3, 30/5, 30/8 with the part after / ordered if the part before / is same! Please help!!
2
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3answers
308 views

Storing a Shipping Address Best Practice

I'm building a checkout system which needs to store the customer's shipping address in the database and am unsure the best way to go about it. Currently I have an addresses table which stores each ...
5
votes
2answers
172 views

Strange query results for DELETE with ROW_NUMBER

In the following DELETE statement I try to delete all rows except the first one ordered by some criteria. (The actual query makes more sense, this is just a repro. All the sys.objects stuff is just ...
17
votes
6answers
10k views

How do I efficiently get “the most recent corresponding row”?

I have a query pattern that must be very common, but I don't know how to write an efficient query for it. I want to look up the rows of a table that correspond to "the most recent date not after" the ...
0
votes
1answer
69 views

Any way to get database data back?

So I've entered a couple hundred rows of data into a database manually and have begun implementing a Java frontend. However, I got an unexpected result and now when I go back into RazorSQL, the ...
2
votes
1answer
27 views

Best way of finding rows referencing a given id on PostgreSQL

I'm trying to find if there would be anything violating the foreign key constraint when deleting a row, to check if I can delete it or not (can't use ON DELETE CASCADE) For that, I have a piece of ...
0
votes
1answer
115 views

Mysql Select table records which have not been updated since last month

I have a table names 'scoredata' having fields id, lessonid, levelid, studentid, addedate in which score for each day will be entered by the admin. I want to select only those studentid whose score ...
1
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1answer
124 views

SQL Server Cross Domain Transcational Replication

Has anyone got any documentation for doing/implementing Cross Domain SQL Server 2012/2008R2/2008 transactional replication document or steps (with screenshot or without screenshot) Thanks for your ...
-2
votes
1answer
34 views

Subqueries in SQL Server 2014 [on hold]

I want to get results that is in more than one row using a subquery. here is what: Note. This is in microsoft SQL Server 2014. Relations: FeeStudent(Feeid, Studentid, MODE,LEVEL, SEM, Paid, Status) ...
1
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1answer
84 views

Check entry based on entry in another column

Still fairly new to databases and SQL, so bear with me. I'm trying to check whether or not data can be inserted depending on data in another column, create table Table1 (PaymentType varchar(5) ...
2
votes
1answer
294 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.
1
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1answer
62 views

Print the execution time on messages Pane?

How I can print the execution time of each query on messages Pane? For example the Select * from tbl1 runs for 10 mins then Select * from tbl2 runs for 15mins and so on.. Select * from tbl1 Go Select ...
-1
votes
2answers
38 views

How is SQL used from an end-user perspective? [on hold]

So I've been learning database manipulation and design and using SQL, but surely a secretary of a company wouldn't be using SQL to directly enter things into the database, so how does that work? For ...
0
votes
1answer
15 views

How to limit results using join in SQL in php [on hold]

I have one table of comments and a second table of students. I want to limit results from these tables using a simple join but I don't know how to. My query is like SELECT com_des,com_doc,usr_name ...
0
votes
1answer
59 views

Is it good practice to keep 2 related tables (using auto_increment PK) to have the same Max of auto_increment ID when table1 got modified?

This question is about good design practice in database. Let see this example, we have 2 interrelated tables: Table1 textID - text 1 - love.. 2 - men... ... Table2 rID - textID 1 - 1 2 ...
0
votes
1answer
166 views

Nested query not recognize external table

i need to a query that show week by week the total amount of imports of any company and in addition add a ranking position depending on that amount. I've made this query but the problem is the inner ...
8
votes
1answer
101 views

Clustered Columnstore indexes in SQL Serer 2014 for data warehousing

I am performance tuning a DWH using indexes. I Am fairly new to SQL Server 2014. MS describes the following: "We view the clustered columnstore index as the standard for storing large data ...
1
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1answer
332 views

Optimising a query of an SSRS dataset

Consider the query given below: SELECT * FROM ((SELECT c.cust_id , c.username , REPLACE(qs.seg_type_ref_key_02, 'N/A', 'Non Vip') casino_group, ...
0
votes
2answers
66 views

Netezza Error Record size 120000 exceeds internal limit of 65535 bytes

I have a column PARAM that has JSON data that looks like this: JSON:{"Name":"RES_InformationalIssues","StepName":"Page_1","StepData":"f601e9fe-d68a-4ed7-bbaa-f40c9cbc4d12=General Product ...
1
vote
2answers
489 views

Obvious inefficiencies in this Netezza query?

Why might this query be taking nearly 2 hours to run when similar queries complete within a minute? CREATE TABLE T3 AS SELECT A.*, COALESCE(C.FIELD1,0) AS FIELD1A, ...
0
votes
3answers
46 views

Performance first low, then high after adding index, then keep high after drop index

I am testing performance a complicated select query. It is very slow. using explain, I have found a ALL in type COLUMN. Then I ADD INDEX. result comes out fast. However, when I DROP the INDEX I ...
5
votes
4answers
6k views

Emulate REGEXP like behaviour in DB2 SQL

I posted the same on stackoverflow (please, let me know if I have to delete one). I'm working on a DB2 database and as far as I can see regexp is not supported (without additional libraries). So I ...
2
votes
2answers
39 views

Oracle: Helping hand writing this query. Do I need a sub query here?

I have the below query that returns the number of orders created on a particular customer number per month for the past 2 years. SQL SELECT TO_CHAR(o.entry_date, 'MM'), SUM(CASE ...
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votes
1answer
31 views

Oracle Concurrent Insertion

We have simple case like Create table t1 (c1 number primary); session1: insert into t1 values (1); //session1 do not commit transaction session2: insert into t1 values (2); Will Session2 ...
2
votes
2answers
185 views

Join 3 tables and return only distinct values for max datetime

I've been trying to do this the whole 2 weeks but seems like to no avail. 3 tables involved here. but am expecting the result would be distinct case no. for the same date & user. otherwise, it ...
1
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1answer
24 views

group records according to column

hi how can make this result query: to this: I have this code and i know it's still farfetched: select max(case subcod when 'DISABILITY' then A end) as disability, max(case ...
0
votes
1answer
44 views

SQL Server 2008 and constant expressions

If I have the following scenario, would Replace be evaluated a single time? DECLARE @text nvarchar(32) = 'This is a test field' SELECT textField FROM Table WHERE Id = @idICareAbout AND textField = ...
1
vote
3answers
31 views

Study material for Advanced Databases module inc SQL, Relational Model, ERM & TM [on hold]

For my next module in my masters, I am planning on studying Advanced Databases. (Long story short, the masters is designed for people with NON-CS degrees, so I have never studied databases, therefore ...
2
votes
1answer
147 views

How to allow connections to SQL Server with 2 differents ip

I have a small issue here: I have a SQL Server instance 2012 (let's call it INSTANCE) on a cluster. I also have 2 network interfaces for this instance: SQLINSTANCE.my.metwork ...
2
votes
3answers
274 views

SQL Profiler - Insert values?

I setup an SQL profiler to run, but I am not seeing any values for updates/inserts. Is there a way to see them? All I see is stuff like this: insert into some_tbl(id, col1, col2, col3) values ( @P0 ...
0
votes
1answer
73 views

Why can't modern databases have unlimited columns [on hold]

I am just curious as to why big open source and commercial RDBMSs can't, don't or won't implement unlimited columns per table? Is there a technical or business reason why this can't be done. MongoDB ...
1
vote
2answers
4k views

exporting oracle tables on command line as sql files

I use exp and expdp to export database tables on command line but it generates binary .dmp files. I want to export/import tables as .sql* files on command line like pl/sql developer app can do. Is ...
0
votes
0answers
21 views

Receiving duplicate results in one condition of JOINED query

I always end up here when Googling for solutions, so I thought I'd cut out the middleman since I'm unable to fix this via searching/forums. It's my first time posting, so please forgive any faux pas ...
0
votes
2answers
17 views

Create a test enviroment in Oracle 10g

I have a production enviroment in a Oracle 10g database which I would like to authomatically duplicate in a test enviroment. My production enviroment is just a number of tables in which I have usually ...
0
votes
0answers
39 views

SSRS URL Changes while navigating

I am trying to track down the root cause of this issue I keep seeing. We have SSRS running with a custom URL like https://reporting.companyname.com/reports. When I connect to that address I can ...
2
votes
1answer
70 views

PostgreSQL return second 'Group' as an array

I have some tables that include websites and visitors and I am trying to write a query that produces a 'top 10' for each site, the tables look something like this... websites ------- website_id (pk) ...
0
votes
1answer
24 views

MySQL: Rank by Department in an employees table

I need Mysql query to rank the hours used by each department in an employees table, but it just ranks all without taking into consideration the departments.
3
votes
0answers
46 views

Need help with a Running Total Issue

Using SQL-Server 2008 R2 and Report Builder 3.0 Here is my query without the running total column: SELECT CostManagement_CommitmentDetails.Id ,CostManagement_CommitmentDetails.LineNumber AS ...
1
vote
1answer
22 views

2 Date Ranges - How many days from one range excluding weekends overlap

First - Thanks for your help. I'm looking to create a query in SQL that provides the me the # of days from one date range that overlap another date range and excludes weekends. Example Data: ...
0
votes
0answers
56 views

Suitable database to store GPS track data

I have a network of vehicles. Each vehicle is equipped with a GPS sensor sending data over 3G to my FTP server. As a first solution to test the sensors, each vehicle sensor sends a .csv file to the ...
1
vote
1answer
32 views

How to query a list of all the different errors?

I have a DB which is very big and stores a lot of eventlogs, around 15 million rows. When I try this query, it is totally impossible to get some results. Any idea how I could do this? Maybe indexed ...
2
votes
2answers
155 views

SQL query for next occurrence of specific date

I am working on a function for our database that contains contract data. Each contract expires on a certain date, and then each contract has an expiration type that determines what happens after that ...