General MySQL Oracle SQL Server

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"DROP SCHEMA" - Dropping an Existing Schema in SQL Server
How To Drop an Existing Schema in SQL Server? If you want to delete a schema, you need to move all objects out of that schema, then use the "DROP SCHEMA" statement to delete the schema. The tutorial exercise below shows you how to drop schema "fyi": -- Login with "sa" USE FyiCenterData; GO -- Drop f... 2016-10-20, 2557🔥, 0💬

Security Principals Used in SQL Server 2005 in SQL Server
What Are Security Principals Used in SQL Server 2005 in SQL Server? SQL Server 2005 supports several basic security principals located at different levels: Windows-Level Principals: Windows Local Login and Windows Network Domain Login - Used to control accesses to SQL Server instances. SQL Server-Le... 2016-10-20, 2528🔥, 0💬

Security Model Used in SQL Server 2005 in SQL Server
What Is the Security Model Used in SQL Server 2005 in SQL Server? SQL Server 2005 uses a very standard security model involves 3 concepts: Securables - Entities representing resources that need to be secured. For example, a database table is a securable. Principals - Entities representing users that... 2016-10-20, 2358🔥, 0💬

Define External Table in a Text File in Oracle
How To Define an External Table in a Text File in Oracle? You can use the CREATE TABLE statement to create external tables. But you need to use ORGANIZATION EXTERNAL clause to specify the external file location and the data access driver. The tutorial exercise below shows you how to define an extern... 2016-10-19, 3847🔥, 1💬

💬 2016-10-19 Randy: Great example, Thanks!

"ALTER LOGIN" - Disabling a Login Name in SQL Server
How To Disable a Login Name in SQL Server? If you want temporarily disable a login name, you can use the "ALTER LOGIN" statement with a DISABLE keyword. If you want to enable it later on, you can use the ENABLE keyword. The tutorial exercise below shows how to disable and enable login name "Dba_Logi... 2016-10-19, 4478🔥, 0💬

"DROP LOGIN" - Deleting a Login Name in SQL Server
How To Delete a Login Name in SQL Server? If you don't want to keep a login name any more, you should delete it by using the "DROP LOGIN" statement as shown in this tutorial example: -- Login with "sa" DROP LOGIN Dba_Login; GO Command(s) completed successfully. -- View login names SELECT name, sid, ... 2016-10-19, 3092🔥, 0💬

"ALTER LOGIN" - Changing a Login Name in SQL Server
How To Change a Login Name in SQL Server? If you want to change a login name, you can use the "ALTER LOGIN" statement as shown in this tutorial example: -- Login with "sa" -- Change login name ALTER LOGIN Fyi_Login WITH NAME = Dba_Login; GO -- View login names SELECT name, sid, type, type_desc FROM ... 2016-10-19, 2818🔥, 0💬

"CREATE USER" - Creating a User Name in a Database in SQL Server
How To Create a User Name in a Database in SQL Server? User names are security principals at the database level. If you want to allow a login name to access a specific database, you need to create a user name in that database and link it to the login name. Creating a user name can be done by using t... 2016-10-19, 2539🔥, 0💬

SQL Server Database Tutorials
Where to find SQL Server database server tutorials? Here is a collection of tutorials, tips and FAQs for SQL Server DBA and SQL Server database application developers. Clear explanations and sample scripts provided can be used as learning tutorials or interview preparation guides. It doesn't matter ... 2016-10-18, 30633🔥, 0💬

About dba.FYIcenter.com Website
What is dba.FYIcenter.com Website about? dba.FYIcenter.com is a Website for DBAs (database administrators) and database application developers looking for database server management tips, database programming tutorials, career information, and so on. Just browse through the site, you will find the b... 2016-10-17, 18115🔥, 0💬

Creating Multi-Statement Table-Value Functions in SQL Server
How To Create an Multi-Statement Table-Valued Function in SQL Server Transact-SQL? To create a multi-statement table-valued function, you need to define a temporary table as the returning table in the function. INSERT statements should be used to insert data into the returning table. The tutorial ex... 2016-10-17, 3670🔥, 0💬

"DECLARE ... CURSOR" - Declaring Cursor Objects in SQL Server
How To Declare a Cursor with "DECLARE ... CURSOR" in SQL Server Transact-SQL? If you want to use a cursor to represent the result set of a query, you need to define a cursor name with a SELECT sub-statement using the "DECLARE ... CURSOR" statement using the following syntax format: DECLARE cursor_na... 2016-10-17, 3558🔥, 0💬

"FETCH" - Fetching the Next Row from a Cursor in SQL Server
How To Fetch the Next Row from a Cursor with a "FETCH" Statement in SQL Server Transact-SQL? When the result set is ready in a cursor, you can use a FETCH statement to retrieve one row from the result set in the same format as a SELECT statement. The FETCH statement has the following formats: FETCH ... 2016-10-17, 3199🔥, 0💬

What Are Cursors in SQL Server
What Are Cursors in SQL Server Transact-SQL? A cursor is a special data type that represents a result set returned by a SELECT query statement. There are several notes about cursor you need to remember: Cursor data type can not be used to define table columns. Cursor data type is used on store proce... 2016-10-17, 2743🔥, 0💬

Using Cursors in SQL Server Transact-SQL
Where to find answers to frequently asked questions on Using Cursors in SQL Server Transact-SQL? I want to loop through rows in a result set. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Using Cursors in SQL Server Transact-SQL. Clear explanati... 2016-10-17, 2696🔥, 0💬

"OPEN" - Executing the Query of a Cursor in SQL Server
How To Execute the Cursor Queries with "OPEN" Statements in SQL Server Transact-SQL? Once a cursor is declared, you need to execute the query attached to the cursor so that the result set returned from the query can be accessed through the cursor. To execute the cursor query, you should use the OPEN... 2016-10-17, 2494🔥, 0💬

DYNAMIC - Creating Dynamic Cursors in SQL Server
How To Create a Dynamic Cursor with the DYNAMIC Option in SQL Server Transact-SQL? If the underlying table is changed after the cursor is opened, should the changes be reflected in the cursor result set? The answer is based on the update option used when creating the cursor. SQL SERVER supports two ... 2016-10-17, 6702🔥, 0💬

"@@FETCH_STATUS" - Looping through Result Set in SQL Server
How To Loop through the Result Set with @@FETCH_STATUS in SQL Server Transact-SQL? The FETCH statement only returns one row from the result set. If you want to return all rows, you need to put the FETCH statement in a loop. A simple way to stop the loop to check the system variable @@FETCH_STATUS, w... 2016-10-17, 3199🔥, 0💬

SCROLL - Creating Cursors for Backward Scrolling in SQL Server
How To Create a Scrollable Cursor with the SCROLL Option in SQL Server Transact-SQL? SQL Server offers two scrolling option on cursors: 1. FORWARD_ONLY - The cursor can only be scrolled forward with "FETCH NEXT" statements. In another word, you can only loop through the cursor from the first row to ... 2016-10-17, 3106🔥, 0💬

Declaring and Using Cursor Variables in SQL Server
How To Declare and Use Cursor Variables in SQL Server Transact-SQL? There are two ways to representing a cursor: 1. A cursor name - A static name representing a cursor object. A cursor name should be linked to a cursor object in the DECLARE statement. 2. A cursor variable name - A variable name poin... 2016-10-17, 2821🔥, 0💬

"FETCH" - Transferring Data from Cursors to Variables in SQL Server
How To Transfer Data from a Cursor to Variables with a "FETCH" Statement in SQL Server Transact-SQL? By default, a FETCH statement will display the fetched row on the client program window. If you want to transfer the output data to variables, you can specify an INTO clause with a list of variables ... 2016-10-17, 2527🔥, 0💬

Transaction Committed when START TRANSACTION Executed in MySQL
What Happens to the Current Transaction If a START TRANSACTION Is Executed in MySQL? If you are in a middle of a current transaction, and a START TRANSACTION command is executed, the current transaction will be committed and ended. All the database changes made in the current transaction will become... 2016-10-17, 4785🔥, 0💬

Ways to Start a New Transaction in MySQL
How To Start a New Transaction in MySQL? MySQL server offers two modes to manage transactions: Autocommit On - Default mode. Can be started with "SET AUTOCOMMIT = 1" command. In this mode, every single SQL statement is a new transaction. All changes will be committed at the end of the statement exec... 2016-10-17, 3093🔥, 0💬

Turn on and off Autocommit in MySQL
How To Switch between Autocommit-On and Autocommit-Off Modes in MySQL? By default, your connection session will be in Autocommit-On mode, where every server executable statement will start a new transaction, and end the transaction when the execution ends. Changes will be committed. So consider this... 2016-10-17, 3041🔥, 0💬

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General MySQL Oracle SQL Server