A core SQL statement, SELECT retrieves data from one or more tables or other sources of row set data such as views or table-valued functions.

learn more… | top users | synonyms

15
votes
3answers
22k views

What is the default order of records for a SELECT statement in MySQL?

Suppose you have the following table and data: create table t(k int, v int,index k(k)) engine=memory; insert into t values(10, 1), (10, 2), (10, 3); When issuing select * from t where k = 10 with ...
3
votes
3answers
12k views

Return int value from boolean field in SQL select

Is there a way to return an int value for a boolean field in a sql select statement?
1
vote
1answer
421 views

Simple select statement not returning correct data

I am trying to return data, where I want the item name (items.name), vendor name (vendors.name), url of the price (prices.url), and the price (prices.price) from 3 different tables (items,vendors and ...
3
votes
2answers
3k views

Does the SELECT statement count into DML?

Looking at the name Data Manipulation Language (DML) I would assume, that all contained statements are actually for manipulating data. As far as I know the SELECT statement can only be used to query ...
4
votes
2answers
2k views

Has SELECT an INSERT clause?

I know the form Select * into new_table from old_table statement. Bur recently I found 2 posts here and here which use it like SELECT * FROM NhlPlayer INSERT INTO PlayerBackups I find nothing in ...
16
votes
7answers
32k views

Is it possible to mysqldump a subset of a database required to reproduce a query?

Background I would like to provide the subset of my database required to reproduce a select query. My goal is to make my computational workflow reproducible (as in reproducible research). Question ...
1
vote
1answer
324 views

Shift db data to another column

I have the following table id | ev_id | ev_loc_id | a | b | prev_a | prev_b If I the (ev_id AND ev_loc_id) not exist in the table then I just insert them, otherwise I'm putting ...
6
votes
2answers
10k views

How to use variables inside a select (SQL Server)?

If I want to compute a column and use the result in more than 1 column, how do I do this without making the computing twice? Example: SELECT LOWER(SUBSTRING([NAME], 4, 100)) + '@somedomain.com' as ...
1
vote
1answer
174 views

Complex mysql selection

I have the following table, id | booki_id | bet_id | bet | bettype | line | odds 1 | 123 | 321 | 1 | 3way | 0,0 | 2.3 2 | 123 | 321 | 2 | 3way | ...
2
votes
5answers
21k views

Retrieving row count without using Count function

I wrote a query below which shoots me a syntax error why would it do so, SELECT MAX('Row') FROM (SELECT ROW_NUMBER() OVER(ORDER BY ID DESC) 'Row' FROM USERS) Error Desc: Incorrect syntax near ...
4
votes
2answers
6k views

SQL Xml returning empty root tag on empty record set

I am working on xml explicit to generate user defined nodes in xml output using Sql Server 2005 Express edition. The below code works fine, just that i couldn't manage to generate a empty node when ...
2
votes
1answer
229 views

Query table A for any rows that are like any search term in table B

I need some help writing a select statement (I still don't think in sets!). Here's the scenario: I have table A with column "Name varchar(20)". I have table B with column "SearchTerm varchar(20)". I ...
1
vote
2answers
123 views

“For each group of results fullfilling condition X, select only result with smallest column value A”

I have a table with data and dates like so: DECLARE @p TABLE (P_key int, P_Data char(1), P_ValidUntil datetime) INSERT @p VALUES (20, 'T', '2003-02-28') INSERT @p VALUES (21, 'U', '2005-05-31') ...
17
votes
5answers
42k views

How can I use a default value in a Select query in PostgreSQL?

I would like to use a default value for a column that should be used if no rows is returned. Is that possible in PostgreSQL? How can I do it? Or is there any other way I can solve this? E.g. ...