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
187 views

Self-join unique pairs

I have a table (players) containing a list of players, I would like to pair up these players in a unique way, so that every player's opponent is unique every round (ie. every time the SELECT query is ...
2
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0answers
88 views

SQL Server 2012 High availability Groups for OLTP and Reporting environments

I would like to seek your advice in designing a high availability architecture at my current work place. We are moving to SQL Server 2012 platform and we currently have a set of OLTP databases ...
4
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1answer
244 views

date formatting in Oracle

this query: select to_char(sysdate, 'Ddspth MONTH, Yyyysp') from dual will return: Eighteenth MARCH , Two Thousand Fourteen i am wondering if there are any additional formatting keywords that ...
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0answers
75 views

Efficient way to Add NON-CLUSTERED Index?

I have the following table, CREATE TABLE [dbo].[Products]( [ID] [int] IDENTITY(1,1) NOT NULL, [RetailerID] [int] NOT NULL, [Name] [nvarchar](255) NOT NULL, [Price] [float] NULL, ...
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2answers
96 views

compare dates in results

I'm looking to compare the dates in the result set Example: SELECT * FROM tbl WHERE foo=bar Output id, datetime, name 1, 2014-01-01 18:13:45, test 1 2, 2014-01-01 19:01:32, test 2 3, 2014-01-01 ...
3
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1answer
98 views

Generate Agent Job Report

We have a few jobs that run nightly that the status has to be reported every hour. I am trying to find in MSDB where I can capture the information below hourly and send out an excel file. Server ...
0
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2answers
273 views

What is the difference between COUNT(*) AND COUNT([attribute]) in the following scenario?

I have the following tables : DEPARTMENT department_id department_name manager_id location_id and EMPLOYEES employee_id first_name last_name email phone_number hire_date job_id salary ...
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2answers
4k views

Inserting data into a table with one value as clob and blob

My table has one clob column and one blob column. I need to insert data into it through insert statements. The length of data to be inserted is more than 4000 chars. When I do export of insert ...
1
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0answers
75 views

Script to query MongoDB with PHP [closed]

With Code Igniter and MySQL I do: $this->database->query('select * from table'); But I don't know how to use MongoDB. Can I still use this the same way to query MongoDB? ...
0
votes
2answers
32 views

Return row in given date

I have a MySQL table named tasks that contains four columns: id (Integer) name (Varchar) task_start (DateTime) task_finish (DateTime) How can I write an SQL statement that returns tasks that are ...
2
votes
1answer
94 views

How to monitor load on database server

Could anybody please suggest me a way to monitor the load on my database server? What perfmon counters should I monitor on daily basis and confirm that load on the server is increasing day by day [or] ...
4
votes
2answers
701 views

Update Statement takes forever to complete [closed]

I have table around 1250000 records, and 80 columns Table Structure CREATE TABLE [dbo].[Table] ( [Column1] [int] IDENTITY(1, 1) NOT FOR REPLICATION NOT NULL, [Column2] [int] NULL, [Column3] [int] ...
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3answers
235 views

Need a faster method to concatenate rows into column(s)--currently using CTEs

Currently, we are using a view which I created that pulls data from a number of tables. The major factor about this is getting the view to specifications involves a mix of CTEs and string ...
0
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0answers
125 views

Exception in SQL client but not in stored procedure

I am using Oracle 11g and SQLDeveloper for this scenario. In this scenario, I am trying to simulate an exception within a stored procedure but it is not happening. My DB runs in GMT. My client ...
4
votes
1answer
114 views

“Ranking” values in an ORDER BY clause?

I have the following table: Table "public.employee_employee" Column | Type | Modifiers ...
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votes
0answers
27 views

Database tables to store all old relations between them (SQL)

i have a main table with lines that never update, and i need relate each line from table 0 to one line from table1, one line from table2 and one line from table3. But the 3 relations change every ...
0
votes
1answer
43 views

Combining 2 queries

Need some help. I would like to combine 2 queries in MS Query. Query 1: Select c.Ship_Name, a.Voy, a.Start_Pos, a.End_Pos, a.Comments_Pos From Table1 a, Table2 ...
6
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0answers
247 views

Is this a race condition or bug in sql server using serializable TIL with updlock? [closed]

I've been staring at this problem for almost a week now. I'm getting a deadlock in some query, and I've reduced the problem to these reproducible steps: Create a database with: create table offering ...
0
votes
0answers
198 views

How to convert Excel into Star-schema Model?

My end user gave an Excel spreadsheet with 15 columns and 50K rows out of which 5 columns are calculated and 10 are not. My data modeler has converted Excel into a single TABLE on Microsoft SQL ...
1
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2answers
135 views

Triggers After Insert and After Update - Good Practice

It is a good practice to have a separate trigger for After Insert and another one for After Update or there is no problem in having both in the same logic? Also from a perspective of performance it ...
0
votes
1answer
102 views

Help with SQLPSX output for replication

I am using the CodePlex project SQL Server PowerShell Extensions (SQLPSX) to generate script files for replication. Everything is working as I want except for one thing. I have looked through the ...
0
votes
2answers
300 views

DMV queries for capturing most frequently used queries and worst performing queries [closed]

Can anyone provide dmv query to achieve the following Query to capture frequently used stored procedure Query to capture frequently used ad-hoc queries Query to capture worst performing stored ...
1
vote
2answers
37 views

SQL Booleans vs ManyToMany

As I understand it, one way to 'abstract' a parent/child relationship in SQL would be to have a table set up with a joining foreign key table. Ie in this case, the swimsets are children of different ...
1
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1answer
83 views

How does the transactions interact if you set a different isolation level per connection?

I read that I can have different isolation levels per connection and in the server. The default isolation level is REPEATABLE-READ. So if I have a transaction that issues a SERIALIZED to the client ...
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2answers
98 views

Transaction basics. What is the result of 2 transactions running concurrently?

I have a rather basic question on transactions. Assume a table Account with a column amount. Now we have the following code: BEGIN $amount = SELECT amount FROM ACCOUNT WHERE id = 123; $amount = ...
1
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0answers
51 views

Will installing WebMatrix (and Consequently SQL Server CE) Break My Current Installation of SQL Server 2005?

We have a server that has (and needs to keep) SQL Server 2005. We are hosting intranet sites on one server (server 1), but have a database on another server (server 2). One of these sites uses AJAX ...
0
votes
1answer
75 views

Comparing execution plans [closed]

How does the optimizer compare different execution plans of the same query? Let's say we have two complex and structurally different execution plans, how can I know if they are providing the same ...
4
votes
1answer
211 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
45 views

Ms Access SQL problem

in this table Customer is actually storing CUSID (i have pleased the caption customer and made it display the name to which the CUSID corresponds to) now in the CUSnum field i want it to ...
2
votes
2answers
88 views

SELECT DISTINCT with another table

I want to use distinct to display my data. But I don't know how to do it.This is my code.I want to display table gtest_version field max(poly_version) select distinct on (rule_name) ...
1
vote
1answer
33 views

Methods for identifying differences in accumulating history table?

This question will probably be elementary to most DBAs. I'm doing light DB work which isn't my specialty and I'd like to create some kind of "change log" for a table that is copy/appended to a ...
0
votes
0answers
505 views

SQL Timeout to Principle Server Error

I am seeing a timeout to the Pricincipel SQL server (2008 R2) The exact error I am seeing is this: Timeout expired. The timeout period elapsed prior to completion of the operation or the server ...
0
votes
1answer
80 views

How to retrieve whether database has any tables?

Knowing to use SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE' to query for a list of tables, I'm currently finding no way to retrieve a list of non-system tables only. I.e. ...
0
votes
1answer
87 views

How can I get the latest five scores per user per subject?

There is a Postgres table in our system called "scores" which records test scores. It has test takers (users of our system), scores from 0-10, depts and dates each time a test was taken, like this: ...
0
votes
1answer
315 views

I'm trying to run an oracle database in virtual box under oracle linux

I'm trying to run a oracle DB in VirtualBox and access it from my host mac OSX , i am using port forwarding to access my guest, I can telnet my guest on the port, however when i try to connect from ...
0
votes
1answer
46 views

SQL tables relations

i'm making a MySQL data base , my tables are: users, activitylog, activitytype. to avoid repetitions i thought about including activitytype in each activity which is logged into activitylog table, ...
1
vote
1answer
433 views

How different clauses treat Null/Unknow in SQL Server 2012?

(relatively new to SQL and SQL Server) I am reading SQL Server 2012 T-SQL Fundamentals by Itzik Ben-Gan. Autor states that: SQL has different treatments for UNKNOWN in different language ...
0
votes
1answer
120 views

how service sid operate under the covers?

This question is out of curiosity and it left me in confusion whether service account as any role to play in sql server startup and shutdown? Can anybody explain how sql server 2008 Service Sids work ...
0
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0answers
87 views

How to generate TPC_DS queries for Oracle?

I have downloaded the DSGEN tool from the TPC-DS web site and already generated the tables and loaded the data into Oracle XE. I am using the following command to generate the SQL statements: ...
0
votes
1answer
1k views

advantages and disadvantages of using direct sql querying in application [closed]

could people please give their opinion on and give advantages and disadvantages on the use of sql queries directly within an application as opposed to creating procedures or functions within the ...
0
votes
1answer
104 views

Nesting inner to sum inner query's result

Suppose I have a query select a,b from xyz The result would be: a        b m1     10 m2     20 m3     30 Can I somehow ...
1
vote
2answers
109 views

Filter by value or show all if no value

I have 2 tables: records and access_rights Access table has list of permission for certain and should be used to filter records based on rules: function field is mandatory object field is ...
0
votes
1answer
420 views

MySQL DB structure with Main category and several nested sub categories

I am looking to create a set of fields on my webpage identical to what eBay uses on their category selection page when you are selling something. For my purposes I am doing motorcycles, power sports, ...
4
votes
2answers
6k views

select all rows with a minimum value

In Sqlite 3 I'm trying to figure out how to select rows based on a minimum value. I think that I'm limited by not knowing enough of the related terminology to effectively search google. The table ...
10
votes
3answers
449 views

Can IS DISTINCT FROM be combined with ANY or ALL somehow?

Is a postgres way of combining IS DISTINCT FROM with ANY or some other neat way of getting the same result? select count(*) from (select 'A' foo union all select 'Z' union all select null) z where ...
0
votes
1answer
84 views

Beginner table design

I have been coding in C# for a couple of years where I usually try to follow the 'single responsibility principle' which states that each class should ideally be responsible for only 1 goal. Now I ...
2
votes
0answers
204 views

Empty Space in buffer pool

I was doing some reading and came across this article from Paul Randal: http://www.sqlskills.com/blogs/paul/performance-issues-from-wasted-buffer-pool-memory/ Using the queries from that article, I ...
2
votes
2answers
312 views

How do I Delete A Database And Log Files With SQL 2008 Script?

While working on making an automated Delete and Restore script for my backups I ran into a snag. I can not delete the database; however, the delete button works exactly how I need it to. Can anyone ...
0
votes
1answer
2k views

PLS-00049 bad bind variable when compiling a trigger

I'm trying to implement a dedupe trigger to a table. CREATE OR REPLACE TRIGGER USER.TBL_ACTION_DEDUP BEFORE INSERT ON USER.ERRORTABLE REFERENCING NEW AS NEW OLD AS OLD FOR EACH ROW BEGIN IF ...
0
votes
0answers
190 views

SQL Server 2008 single-line PIVOT/UNPIVOT combo

I have a request to get information from a table with a stored procedure that shows all the necessary data for in one line. This table includes a hierarchyID, so I am trying to use the HID methods in ...