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How do I turn off Oracle password expiration?
...mand:
ALTER USER xyz_user IDENTIFIED BY new_password;
Below is a little SQL*Plus script that a privileged user (e.g. user 'SYS') can use to reset a user's password to the current existing hashed value stored in the database.
EDIT: Older versions of Oracle store the password or password-hash in t...
What's the difference between a catalog and a schema in a relational database?
...n Introduction to Database Systems, 7th ed., C.J. Date, p 69-70.
From the SQL standard point of view :
Catalogs are named collections of schemas in an SQL-environment. An
SQL-environment contains zero or more catalogs. A catalog contains
one or more schemas, but always contains a schema nam...
Add new column with foreign key constraint in one command
...
As so often with SQL-related question, it depends on the DBMS. Some DBMS allow you to combine ALTER table operations separated by commas. For example...
Informix syntax:
ALTER TABLE one
ADD two_id INTEGER,
ADD CONSTRAINT FOREIGN KE...
Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)
...
Updated
For MS SQL Server 2012 and above
USE [master];
DECLARE @kill varchar(8000) = '';
SELECT @kill = @kill + 'kill ' + CONVERT(varchar(5), session_id) + ';'
FROM sys.dm_exec_sessions
WHERE database_id = db_id('MyDB')
EXEC(@kill);...
Why would you use Oracle database? [closed]
...hy you choose Oracle database versus the latest flavors of:
1) Microsoft SQL Server
2) MySQL
3) PostgreSQL
6 Answer...
What is the meaning of the prefix N in T-SQL statements and when should I use it?
I have seen prefix N in some insert T-SQL queries. Many people have used N before inserting the value in a table.
4 Answe...
Are PDO prepared statements sufficient to prevent SQL injection?
...The short answer is NO, PDO prepares will not defend you from all possible SQL-Injection attacks. For certain obscure edge-cases.
I'm adapting this answer to talk about PDO...
The long answer isn't so easy. It's based off an attack demonstrated here.
The Attack
So, let's start off by showing the...
Remove all spaces from a string in SQL Server
What is the best way to remove all spaces from a string in SQL Server 2008?
23 Answers
...
How do I make a composite key with SQL Server Management Studio?
How do I make a composite key with SQL Server Management Studio?
7 Answers
7
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Is the LIKE operator case-sensitive with MSSQL Server?
...not the operator that is case sensitive, it is the column itself.
When a SQL Server installation is performed a default collation is chosen to the instance. Unless explicitly mentioned otherwise (check the collate clause bellow) when a new database is created it inherits the collation from the ins...