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

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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
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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
204 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
271 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 , ...
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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 ...
7
votes
1answer
177 views

Looking for a set-based solution for a rolling 30-day period

I have a stored procedure (MS SQL Server 2008 R2) that needs to see if 10 points/sales fall within a 30-day rolling window. So far, I have a solution that works, but it's not a "proper" solution as ...
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0answers
78 views

Rebuilding of Index in LogShipping DB in SQL Server 2008 R2 Standard version

Recently I joined the new organization and I am new to Log Shipping. After joining new company I found the fragmentation size of clustered indexes approx 256 indexes more than a 80% and I got the task ...
0
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0answers
250 views

Export a varbinary column to file system using existing authentication

I want to export a varbinary column to a file system. I can use BCP command to export data from a varbinary column, which requires username and password being sent along with BCP command. I can use ...
3
votes
2answers
275 views

Finding violations of the symmetry constraint

Suppose I have a table Friends with columns Friend1ID, Friend2ID. I chose to represent each friendship with two records, say (John, Jeff) and (Jeff, John). Thus, each pair of friends should show up ...
-1
votes
1answer
626 views

delete record if table exists sql

I want to delete record from a table if that table exists Below is the delete statement DELETE FROM UM_CLAIM_BEHAVIOR WHERE UM_TENANT_ID = ? Can I extend this query to check the existence of the ...
0
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1answer
83 views

What does normalization say about storing data from objects that use a decorator pattern?

I am just curious as to what the best practices are for storing the data from objects built using decorator design. I have a base class and can decorate it with A, B, and/or C, with A B and C having ...
1
vote
1answer
168 views

Will SQL charset wildcard query work on Oracle database? [closed]

I am trying to run the following query SELECT * FROM GEEKYBRAINS.admin_emp where ename like '[sm]%'; It results in an empty set. The admin_emp table has the following data though. I am running ...
-1
votes
1answer
179 views

SQL Server CE tools to modify database in network share

I am using SQL Server CE 4.0 SP1. I am using Web Developer 2010 Express to connect to database and perform operations like creating table, modifying column etc. But we cannot connect a database in a ...
0
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2answers
83 views

joining same table without a common field

Oracle 11g/SQLPLUS Given single table TABLE with three fields ID, PARM, VALUE, I want to select and group by based on different values of VALUE E.g. ID PARM VALUE id1 accnt France-1 id2 ...
1
vote
1answer
83 views

Initialize replication from multiple split backup files

We are creating a new Node within our existing P2P replication setup. To be able to create the backup and copy the files I am Backing up to 9 files - each will be about 72Gb: e.g. BACKUP DATABASE [...
3
votes
1answer
920 views

How do you drop an unnamed check constraint in a PostgresQL table?

I created a PostgresQL table but I added an unnamed check constraint on one of the columns: CREATE TABLE FOO ( id serial primary key, price_range smallint CHECK (price_range > 0), url varchar(255) ...
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0answers
272 views

Backup and FTP SQL Server databases

We plan to backup our SQL Server 2012 databases every night, FTP the backup files to our test servers and restore them. Then deploy the latest schemas to those databases. The reason for this is so we ...
3
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1answer
63 views

Wich is the most efficient/easy way for end-user to get data from Analysis database?

I know that you can quey a cube by connecting from excel to Analysis database and using formulas like cubevalue() or cubemember(). I also know that after converting the power pivot to formulas you can ...
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4answers
92 views

PostgreSQL execute a default query when no row are returned

I need to calculate the average score of a list of userId. I have a table user_place_score: (user_id, place_id, score) Sometimes I do not have the score (no row for (user_id,place_id) in the table)...
2
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1answer
70 views

Auditing/Logging Help

I'm working on a request to start logging some additional data for PCI compliance. I need to log who, when, and what changed on a set of tables. I set up SQL auditing which would work fine except ...
0
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1answer
69 views

same table on different commands (inner join)

Testing some commands of MySQL, I've come across these two comands resulting on the same table. Command 1: select sales.relatory_code, sales.date, destiny.exportation_name from sales, destiny where ...
2
votes
1answer
134 views

I can't create relationship in my database sql server

I have designed a database for my website. It has 3 tables: user, topic and comment. A user has many topics (or articles) A topic (or article) has many comments A user has many comments I ...
2
votes
1answer
2k views

Alter table Statement Failed -Msg 207, Level 16, State 1

I wrote a script to add a column in a table and on successful execution update its values. I know it’s just a simple script but what is wrong with the ‘IF NOT EXISTS’ statement why script between ...
1
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1answer
893 views

Why is Excel File Opened Exclusively By Another?

I'm creating an SSIS package to loop through a series of Excel files (.xls). I create my while loop container and then create my data flow, which includes an Excel source. When I edit my Excel ...
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3answers
161 views

Remove duplicates from different columns

I'm trying to remove duplicates from a set, but the duplicates are in different columns, so for example with this table: ColA, ColB, ColC, ColD ---------- 1, 1, 'ABC', 'DEF' ---------- 1, 1, 'DEF', ...
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0answers
85 views

Does partitioning help if you don't query on the partition value?

Say I have an orders.Order table that is partitioned on CreatedWhen (a datetime column set to GetDate() when the row is created). The table has over 10 million rows and the partition is quarterly (...
2
votes
2answers
194 views

Should I set document version field to be part of a primary key

Should I set document version as a primary key I am working on a document management system, and I have these two tables representing part of the whole tables. On the DocumentVersion table I have ...
0
votes
1answer
58 views

Aggregating two queries and returning a COUNT of some permutations

Hopefully the title can make sense to somebody, so I can get somebody working with a database (BigQuery in my case) to look into into. Given two quarters, I need to find out the # of orders placed by ...
1
vote
1answer
112 views

T-SQL Create Query - Compare and Calculate

I got a mini fantasy league (NBA) and would like some help with a query that turns averages into "ranking points". Basically I got two tables. Source table: This is a table with statistical per ...
1
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1answer
41 views

How to use insert and select simultaneously? [duplicate]

I have table test and it has columns id,name and age.I want the id so I am querying like it select id from test where age=12 After I get the id I am updating the name using update query Now lets ...
0
votes
1answer
377 views

SQL access query to count and delete rows > n

Can someone help me with a SQL (Access) query to delete all rows greater than n entries ordered by ID? I.e. say I have 1200 rows of data with ID incremented . I need delete the first amount leaving ...
1
vote
2answers
416 views

How to List SYNONYMS that no longer point to a valid object?

I have a table (OBJECTS_TO_UPDATE) with several objects I need to update, some are SYNONYMs for objects that no longer exist. I want to create a query to list them. But I am stuck. My table ...
8
votes
3answers
6k views

Using DISTINCT in window function with OVER

I'm trying to migrate a query from Oracle to SQL Server 2014. Here is my query which works great in Oracle: select count(distinct A) over (partition by B) / count(*) over() as A_B from MyTable ...
1
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0answers
50 views

Is there any way to improve this code?

SELECT tblstud.studid, tblsched.ip FROM tblstud LEFT JOIN tblstudsched ON (tblstud.studid=tblstudsched.studid) LEFT JOIN tblsched ON (tblstudsched.schedid=tblsched.schedid) ...
0
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1answer
70 views

selecting table1 and table2 with single data row and table 3 with multiple data rows

I want to retrieve data from table1(payments), table2(properties), and table3 (property.assessments). See my visual representation below: tables screenshot Snippets: SELECT a.payment_id, a....
1
vote
1answer
290 views

Get all the data between Characters [closed]

I am trying to extract all the variable from the following string; string = 'factor1|factor2|factor3' This is just a test string. In real string, I do not know the number of factors. What I want is ...
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0answers
58 views

Help with Joins - Cartesian Product

I have 5 regions that each contain 1 store and 1 warehouse. I have a table that contains the regions and corresponding stores and warehouses. I also have a table that lists the inventories of both ...
2
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0answers
35 views

Snapshot Agent - Transactional Replication - Why a complete snapshot?

Often, I will add a single article to an existing transactional replication publication. I then start the snapshot agent to copy the new article and it's data over to the subscriber. Most of the time, ...
2
votes
2answers
1k views

SQL Server DROP Database which is in a long roll back process

I have a DataBase that is taking very long to rollback a transactions. Which could be normally because it is rolling back a hugh amount of data. However I have the scripts to create the DB again and ...
0
votes
0answers
1k views

Unable to connect to or create SQL Server database using asp.net [closed]

In my asp.net project I have SQL Server database with some tables. Unfortunately my PC was not properly shut down and and after that I am unable to connect to my database from Visual Studio (I am ...
0
votes
2answers
102 views

what could be the Best practices with very very large amount of data [closed]

I have a question on building a solution.I have a few txt/csv file having huge amount of data approx 30000000000 rows .By size they are 1.5 TB.The tables based on these data are only for lookup,I mean,...
4
votes
3answers
2k views

Help with SQL Query to XML output

I have the following query: SELECT [ID] AS [NewID] , ( CASE WHEN LEN([MiddleName]) > 0 THEN [LastName] + ', ' + [FirstName] + ' ' + LEFT([MiddleName],1) + '.' ...
0
votes
1answer
3k views

Behaviour of RAISERROR within a TRY/CATCH within a loop

I have just encountered a section of SQL that is behaving not as I would expect (See below for a distilled version of the SQL in question that demonstrates the problem pattern). (This is on SQL ...
1
vote
1answer
2k views

DB2 - Not enough storage in the database heap error when trying to create database

So like the title says I'm trying to create a database using this script db2 -v -t "CREATE DATABASE %DBNAME% ON '%DBDRIVE%' USING CODESET UTF-8 TERRITORY US COLLATE USING SYSTEM CATALOG TABLESPACE ...
1
vote
1answer
105 views

“No Loop” Constraint for hierarchical data in postgresql

I've got table like this in postgres: id primary key parent_id foreign key on id some data columns I need no a constrain which prevents cycles on the parent relations. There might be more tree in ...
1
vote
2answers
3k views

Stored proc getting ANSI_NULLS and ANSI_WARNINGS error when executed by application

I have a stored procedure that is getting the following error when executed via an application : Heterogeneous queries require the ANSI_NULLS and ANSI_WARNINGS options to be set for the connection....
0
votes
1answer
45 views

Will canceling InnoDB compression that's already in progress corrupt data?

I have a 155GB table that is in the process of being compressed. ALTER TABLE $table_name ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8; This compression has been running for a long time and is impeding my ...
0
votes
1answer
164 views

How to get average according to last update time?

There is table - Item below, how can I get the average Value according to its 15 minute value from last record time? I am using SQL Server 2008. Table -- Item Table 15min_AVG