select all sql code example

Example 1: sql all

Returns true if all of the subquery values meet the passed condition.
Example: Returns the users with a higher number of tasks than the user
with the highest number of tasks in the HR department (id 2)
SELECT first_name, surname, tasks_no
FROM users
WHERE tasks_no > ALL (SELECT tasks FROM user WHERE
department_id = 2);

Example 2: sql select syntax

select [all/distinct] <COL1>, <COL2>, <COL3>
from <TABLE_NAME>
[join <JOIN_CONDITION>]
[where <CONDITION>]
[group by <COLUMN_NAME>]
[having <SEARCH_CONDITION>]
[order by <SORT_SPECIFICATION>]


/*
Specifically for SQL -> Oracle

LEGEND: 
[...]   :   optional entries
<...>   :   your specific entry
*/

Example 3: return columns from table sql

SELECT *
FROM INFORMATION_SCHEMA.COLUMNS -- INFORMATION_SCHEMA is an ANSI-standard (American National Standard Institute) set of read-only views which provide information about all of the tables, views, columns, and procedures in a database
WHERE TABLE_NAME = N'Customers' -- "N" defines the subsequent string (the string after the N) as being in unicode

Example 4: sql recherche nom prenom

SELECT * 
FROM personne 
WHERE nom LIKE '".$debut."%'
OR prenom LIKE '".$debut."%'
OR CONCAT(prenom, ' ', nom) LIKE '".$debut."%'

Example 5: select query in sql

SELECT column_name FROM table_name;

Example 6: select database in sql

USE DatabaseName;