General MySQL Oracle SQL Server

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Creating a Logon Trigger in Express Edition in SQL Server
Can You Create a Logon Trigger in SQL Server 2005 Express Edition in SQL Server? Can you create a logon trigger in SQL Server 2005 Express Edition? The answer is no. LOGON is not a supported event type in Express Edition. The script below shows you the error message when you try to create a logon tr... 2016-10-22, 2868🔥, 0💬

Default Schema of Your Login Session in SQL Server
What Is the Default Schema of Your Login Session in SQL Server? When you login to a SQL Server and select a database to use, SQL Server will assign your login session a default schema. The schema name can be omitted when you refer to objects in the default schema. Here is what you should remember ab... 2016-10-22, 2786🔥, 0💬

Who Is the Owner of a Schema in SQL Server
Who Is the Owner of a Schema in SQL Server? When you create a schema in a database, SQL Server will assign a owner (a database user) to this schema. If your login name is mapped to the owner of a schema at the database level, you have the full permission on all objects in this schema. The following ... 2016-10-22, 2467🔥, 0💬

"CREATE TRIGGER" - Creating a DDL Trigger in SQL Server
How To Create a DDL Trigger using "CREATE TRIGGER" Statements in SQL Server? A DDL trigger is defined to handle a DDL statement event, like create, alter and drop tables, views, indexes, etc. DDL triggers can be used to generate warning messages on database object changes. The format of creating a D... 2016-10-22, 2434🔥, 0💬

"INSTEAD OF" - Overriding DML Statements with Triggers in SQL Server
How To Override DML Statements with Triggers in SQL Server? Sometime, you may want to implement some business logics in a DML trigger to cancel the DML statement. For example, you may want to check the new email address format provided by the UPDATE statement. If the email address is invalid, you to... 2016-10-22, 2394🔥, 0💬

"CREATE SCHEMA" - Creating a New Schema in a Database in SQL Server
How To Create a New Schema in a Database in SQL Server? If you want to create a new schema in an existing database, you can use the "CREATE SCHEMA" statement as shown in the tutorial example below: USE FyiCenterData; GO CREATE SCHEMA fyi; GO Command(s) completed successfully. A new schema called "fy... 2016-10-22, 2378🔥, 0💬

Accessing a Schema Not Owned by You in SQL Server
What Happens If You Are Trying to Access a Schema Not Owned by You in SQL Server? In general, if you are trying to access an object in schema owned by another database user, you will get a "permission denied" error, unless that you have been granted access permission to that object explicitly. Here ... 2016-10-22, 2290🔥, 0💬

Creating a New Table in a Given Schema in SQL Server
How To Create a New Table in a Given Schema in SQL Server? When you create a new table, you can specify in which schema you want this table to be located by prefixing the table name with the schema name. In the tutorial example below, a new table "test" is created in schema "fyi": USE FyiCenterData;... 2016-10-22, 2260🔥, 0💬

What Is a Schema in SQL Server 2005 in SQL Server
What Is a Schema in SQL Server 2005 in SQL Server? A schema is a container of database objects with the following interesting related rules: A schema may contain different object types, like tables, indexes, views, procedures, functions, etc. A database user can be assigned with a default schema. Ob... 2016-10-22, 2255🔥, 0💬

Transferring Tables from One Schema to Another in SQL Server
How To Transfer an Existing Table from One Schema to Another Schema in SQL Server? If you want to move an existing table from one schema to another schema, you can use the "ALTER SCHEMA ... TRANSFER ..." statement as shown in the tutorial exercise below: -- Login with "sa" USE FyiCenterData; GO -- C... 2016-10-22, 2208🔥, 0💬

Creating and Managing Schemas in SQL Server
Where to find answers to frequently asked questions on Creating and Managing Schemas in SQL Server? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Creating and Managing Schemas in SQL Server. Clear answers are provided with tutorial exercises on ... 2016-10-22, 2200🔥, 0💬

sys.server_principals - Listing All Login Names in SQL Server
How To List All Login Names on the Server in SQL Server? If you want to see a list of all login names defined on the server, you can use the system view, sys.server_principals as shown in this tutorial exercise: -- Login with sa SELECT name, sid, type, type_desc FROM sys.server_principals WHERE type... 2016-10-20, 6713🔥, 0💬

Managing Security, Login and User in SQL Server
Where to find answers to frequently asked questions on Managing Security, Login and User in SQL Server? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Managing Security, Login and User in SQL Server. Clear answers are provided with tutorial exerc... 2016-10-20, 4699🔥, 0💬

Suser_Sname() - Sever Level Security Principal of Your Session in SQL Server
What Is the Security Principal at the Server Level That Represents Your Session in SQL Server? Security principal identifies who you are when you interact with the SQL Server. What can do you at the server level solely depends on the security principal that represents you. So it is very important to... 2016-10-20, 3364🔥, 0💬

User_Name() - Database Level Security Principal of Your Session in SQL Server
What Is the Security Principal at the Database Level That Represents Your Session in SQL Server? Security principal identifies who you are when you interact with the SQL Server. What can do you at the database solely depends on the security principal that represents you. So it is very important to k... 2016-10-20, 3149🔥, 0💬

Verifying a Login Name with SQLCMD Tool in SQL Server
How To Verify a Login name with SQLCMD Tool in SQL Server? The quickest way to verify a login name on a SQL Server is probably to use the SQLCMD tool, which takes the server name, login name and password in a single command line. Here is how to try it yourself: Start a command window and enter the f... 2016-10-20, 2666🔥, 0💬

"ALTER LOGIN" - Changing the Password of a Login Name in SQL Server
How To Change the Password of a Login Name in SQL Server? If a developer lost the password of his or her login name, you can reset the password with the "ALTER LOGIN" statement as shown in this tutorial example: -- Login with sa ALTER LOGIN FYI_DBA WITH PASSWORD = 'fyicenter'; GO Command(s) complete... 2016-10-20, 2652🔥, 0💬

"CREATE LOGIN" - Creating a New Login Name in SQL Server
How To Create a New Login Name in SQL Server in SQL Server? In previous tutorials, it is assumed that you use the "sa" (System Administrator) login name to connect to your SQL Server. But that is not what a normal developer uses to connect to the server, since "sa" has the ALL permissions granted. Y... 2016-10-20, 2555🔥, 0💬

"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, 2352🔥, 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, 2269🔥, 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, 2148🔥, 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, 3667🔥, 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, 4249🔥, 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, 2866🔥, 0💬

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General MySQL Oracle SQL Server