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

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1answer
954 views

Updating one table from another table where non-primary-key field is similar string

I have a database in Access that I am trying to fix (actually, I'm working on a copy of the original). There are two tables, one with data input errors, and a second that is a copy of those errors, ...
1
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2answers
751 views

Stored procedure - problem with merge - Insert

I am calling a stored procedure from my c# code . The procedure works fine for update, but fails for Insert. Is the following merge-insert procedure code correct? Any help is appreciated. Here is ...
0
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1answer
69 views

Update a set of SQL statements

dbo.MatchFirstName(@FirstName) and dbo.MatchLastName(@LastName) are table Value Functions(TVFs). Problem: In my Update statement i.e Update #Temp after Insert, I want only those rows to be ...
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3answers
5k views

Getting around the constraint “column must appear in the GROUP BY clause or be used in an aggregate function”

I'm using Postgres, which enforces the constraint that all columns in a SELECT...GROUP BY must appear in the GROUP BY clause or be used in an aggregate function. Lets say I'm modelling peoples' cars, ...
0
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1answer
380 views

Why does MariaDB 10.1.2 blow away MySQL 5.6.22 in sysbench?

Problem Maria DB is doing roughly twice the number of transactions that mysql is using standard oltp benchmark. The VM and db's are both fresh installs from vendor apt repos with default configs. ...
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1answer
54 views

Improving lots of Left Joins ( SQL Server 2008 - procedure )

This query is running with 8 minutes to complete. I'm trying to help the programmer with this task. I've created indexes and stats, update_stats and rebuild indexes but none of this is helping us. ...
0
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1answer
44 views

Locking the database to a single user so that other user wont change it

I am using SQL Server CE 4.0. In office the database (.sdf) file are on a server. When I want to change design of the database I have to copy it to local PC and access it since n/w connection to a ...
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1answer
84 views

how to overcome these type of issues where null value inserted into primary key not null column in table

how to overcome these type of issues where null value inserted into primary key not null column in table
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1answer
57 views

Uexpected values inserted in table

I have a table called FunctionWeights which contains data as follows: My query is as follows: select @constVal = FunctionWeight from dbo.FunctionWeights where FunctionWeights.FunctionName = '...
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1answer
380 views

Query on 250 million records

I have a table with below structure CREATE TABLE [dbo].[ColumnValues]( [Id] [int] IDENTITY(1,1) NOT NULL, [ColumnId] [int] NOT NULL, [Value] [nvarchar](max) NULL, [OutputArea] [...
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2answers
110 views

SQL Server tuning: Disk queue to OS drive: How to optimize?

I expect to see the disk queue move on the data, tempdb, log and backup volumes. I do not expect to see the OS drive (C:) which has zero SQL files present, show disk queue impact. Assume it is to ...
0
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1answer
76 views

Exclusive access to edit rows [closed]

I'm developing a program that allows users to view and edit data. My question: Is there tools (sql server tools, may be users/roles) to implement the following: There are two users: A and B. User A ...
0
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1answer
662 views

Update does not working while select returns right results

I am trying to execute the query below: UPDATE( SELECT Ord.Completed FROM Product P INNER JOIN Order1 Ord ON Ord.OrderID = P.OrderID WHERE EXISTS( SELECT * FROM Delivery ...
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0answers
52 views

How can I track changes across 60 local databases with 1 million+ rows each?

The files are mdb and I have them locally on my computer. Just trying to track changes across the 60 databases. Realistically I want to compare two at a time and find the differences in the reports, ...
3
votes
1answer
10k views

How to pass multi-valued characters in SSRS Report?

I have a SSRS report that has 3 data sets feeding off one data source. The main dataset is a stored procedure that is aggregating some data based on a set of parameters powered by the other two ...
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2answers
244 views

Oracle custom week of the year numbering based on first Monday of the year

I have following sql for generating dates, I wanted to change week of the year numbering based on 'First Monday of the Year'. Hence numbering would be, 01-05-15 ---> 01 01-12-15 ---> 02 01-19-...
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1answer
87 views

Long running query…only on replicated database

I have an issue I can't seem to solve and wondering if anything jumps out at you. I have a query that I got from one of our developers, it runs in about 5 seconds on our production database and also ...
1
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1answer
169 views

Get all rows in table A even if no rows in table B in CROSS JOIN

I Have This query SELECT * FROM ( ( SELECT SUM(Auditoria.Importe - ISNULL(Auditoria.Pago, 0)) AS Deuda FROM Auditoria INNER JOIN Articulos_Auditoria ON Auditoria....
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0answers
134 views

How to cast as type of a table column?

I have multiple views with union like this: select column1, column2 from mytable union select cast(extcol as nvarchar2(15)), cast(extcol2 as nvarchar2(10)) from exttable But later I change the size ...
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1answer
68 views

DataBase Back Up - with a Not Null Column [closed]

Can I include a default value to be entered in the Not Null columns when I do database back ups ? If so How can I do that?
0
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1answer
27 views

How to modify the below script to take tables and its sizes for a particular databse to send via mail to a recipient?

SELECT top 10 t.NAME AS TableName, (SUM(a.total_pages) * 8)/1024.0/1024.0 AS TotalSpaceGB FROM sys.tables t INNER JOIN sys.indexes i ON t.OBJECT_ID = i.object_id INNER JOIN ...
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votes
2answers
739 views

Reviewing Stored Procedure template for handling transaction?

I've prepare a template for SQL Server stored procedures which will have Insert, delete, Update transaction. I have a stored procedure to log error in catch block in a table. How can I improve my ...
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0answers
35 views

Can I manage NULL = 'SomeDefault' in the database so applications and SQL don't have to remember this optimization?

I have a table with lots of default values, and want to store very common values as NULL to save space, without forcing my SQL statements or application logic to become overburdened with conditionals. ...
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1answer
1k views

HTML entity decoding with oracle DBMS_XMLGEN.convert

Here, I am trying to convert the value, where I don't understand I am going wrong. Your help is highly appreciated! Here I am#44; THis is me there#39;s nowhere else on earth I rather be Here I am#44; ...
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0answers
24 views

Simplifying UNION query that looks for duplicate names

create table sections( id serial, section_name char(255) not null, version_id int not null ); create table section_versions( id int primary key not null, version_name char(255) not null ); ...
0
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1answer
27 views

wild card for entry id mysql [closed]

So I have a blog and some of my entries are set to "members", but I want to set them to "everyone". I originally thought it was only a few entries and so I thought to change them manually using ...
1
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2answers
264 views

SQL Server - Slow Database for no apparent reason [closed]

I have a DB Server running SQL Server 2008 R2 SP2 on 24 physical Cores and 32GB of RAM. The database files are on a SSD Raid1 and the TempDB on a SAS 15k (150GB DB) I assume that the server has more ...
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0answers
148 views

MySQL Dynamic columns duplicate value workaround

As the title suggests i have the following code which transposes certain row values into field names, however the problem im having is that the values "closed" & "reopened" may appear in several ...
0
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1answer
103 views

Exported CSV from MySQL doesn't appear in specified directory

I'm trying to figure out the syntax to export the results of a MySQL query to the desktop as a CSV file via SSH. Here's what I'm trying: SELECT * INTO OUTFILE 'C:\Users\Jim Smith\Desktop\zyzyz.csv' ...
0
votes
1answer
149 views

NOT IN statement or what to use in this case?

I need to delete each row in fabricante_producto_solicitud (fps from now on) table if fps.id has not relation (NOT IN) fabricante_modelo_marca_producto (fmmp from now on). Since my input will be an ...
0
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0answers
148 views

Database design for varying prices from multiple vendors

I am designing a database where the products are sold in bulk with multiple pricing options, from 4 different vendors. What is the best table configuration to store this information? Id like to be ...
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2answers
1k views

Backup Only Database Schema Everynight

I have an instance with 15 databases on SQL Server 2012. I will set up to backup system which will work every night. I want to backup only the schema because several databases are very big. I haven't ...
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2answers
1k views

OLAP or OLATP - How to determine

I have SQL express server with database that is used by one application. I am trying to optimize the DB but am not sure if the DB is OLTP or OLAP. There is no analysis server installed, the DB is ...
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2answers
396 views

Efficient query to get last row group by multiple columns

I have a table like the following: spread_id serial NOT NULL, game_id integer NOT NULL, sportsbook_id integer NOT NULL, spread_type integer NOT NULL, spread_duration integer NOT NULL, home_line ...
1
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2answers
153 views

New to databases - does my ERD reflect good database design?

I'm making a database to hold data for a media player that I'm working on. Originally, I thought to use one table with the fields: {filePath,artist,title,album,track_number,length,date,artworkUrl} ...
2
votes
1answer
4k views

How to update a table with a stored procedure with XML parameter in SQL 2008?

I have the following Stored Procedure query. This query is incomplete. I need help completing this query. Problem: In this SP, I am receiving a well-formed XML string into the SP. My goal is to ...
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0answers
40 views

Error when creating Trigger (PostgreSQL 9.4)

I created a table 'Company', and I want to create a trigger so a company can only present in one city, but it can be present in several different cities in the same country. For example, there's only ...
0
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0answers
71 views

Auditing SQL Server 2012 [closed]

I work for the State of California. I am working on a project setting up a Data Warehouse sharing data between 3 state agencies. The Data Warehouse will be encrypted. I would like to know what are the ...
5
votes
1answer
372 views

Which parameters was a stored procedure or command executed with?

We are using nHibernate which generates queries from .NET code. Occasionally, some queries get stuck in the sp_whoisactive list and we cannot find out why. I have a feeling that it has to do with a ...
1
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1answer
51 views

How to shard a database like that of SO?

I know a bit about sharding but I cannot wrap my head around that fact that say eventually SO cannot scale vertically then how would they shard their SQL DB? Even if we assume SO will not reach that ...
17
votes
4answers
2k views

Is table aliasing a bad practice?

I remember learning to do this in a DBMS course for Master of Information Services students. To save yourself some typing, you can type: SELECT t1.id, t2.stuff FROM someTable t1 ...
1
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2answers
2k views

SQL ssis delete imported rows from source table

I have setup a simple SSIS package that copies data from a source table to a destination table which works. I would like to get the package to also delete the data in the source table that has been ...
5
votes
1answer
1k views

Order by distance

If I have a query returning nearby cafes: SELECT * FROM cafes c WHERE ( ST_DWithin( ST_GeographyFromText( 'SRID=4326;POINT(' || c.longitude || ' ' || c.latitude || ')' ), ...
0
votes
1answer
30 views

how to query multiple counts on related tables

For each Forum, there are many Posts, and for each Post, there are many Comments I'm trying to query the total number of Posts and Comments for each Forum So I'm looking to have an output as such: ...
0
votes
1answer
70 views

how to get child categorys based on categoryid

this is my table structure i need to find child categoryids. If CategoryID 1 then 1,2,3,4,10,12,13,14,15,16 when CategoryID 2 then 2,10,12,13,14,15,16
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1answer
77 views

Join conditions and Where conditions in Left Join

STUDENT table contains a list of students in my school Database LIBRARY_BOOK table contains the information of each Book that is with currently with any student. each student is allowed only 1 book ...
1
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1answer
205 views

Monitoring the rows in a table

I'm trying to achieve the following tasks in SQL Server. I have a table that I need to monitor its growth. The table shouldn't be containing more than X amount of rows, if there are that many amount ...
2
votes
1answer
146 views

Retrieving latest record using DISTINCT ON is slow [duplicate]

Using Postgres 9.4. I have a table cartests with 5.5M rows. Each row is a car test: \d log.cartests; Table "log.cartests" Column | Type | Modifiers ------------...
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2answers
272 views

Find total duration of each consecutive series of rows

MySQL Version The code will run in MySQL 5.5 Background I have a table like the following one CREATE TABLE t ( id INT NOT NULL AUTO_INCREMENT , patient_id INT NOT NULL , bed_id INT NOT NULL , ...
0
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0answers
434 views

Error in creating trigger in phpMyAdmin

I have 4 tables: event: event_id(p.k) | uid | circle_id(f.k) activity: uid | performed_activity_id(f.k->event_id) | activity_type_id follow: follower_id | circle_id(f.k) notification: sender_id ...