General MySQL Oracle SQL Server

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What Is BDB in MySQL
What Is BDB (BerkeleyDB) in MySQL? BDB (BerkeleyDB) is transaction safe storage engine originally developed at U.C. Berkeley. It is now developed by Sleepycat Software, Inc. (an Oracle company now).   ⇒ What Is CSV in MySQL ⇐ What Is InnoDB in MySQL ⇑ Database Basics and Terminologies in MySQL ⇑⇑ ... 2017-07-03, 1645🔥, 0💬

What Is MyISAM in MySQL
What Is MyISAM in MySQL? MyISAM is a storage engine used as the default storage engine for MySQL database. MyISAM is based on the ISAM (Indexed Sequential Access Method) concept and offers fast data storage and retrieval. But it is not transaction safe.   ⇒ What Is InnoDB in MySQL ⇐ What Is ISAM in... 2017-07-03, 1645🔥, 0💬

Retrieve CREATE TABLE Statement with SQL Developer in Oracle
How To Get a CREATE Statement for an Existing Table in Oracle? You have an existing table and want to get a CREATE statement for that table, you can use the SQL tab in the object view. The following tutorial steps show you how to use SQL Developer to generate a CREATE statement on an existing table:... 2018-10-08, 1643🔥, 0💬

Connect to Local 10g XE Server in Oracle
How To Connect to a Local Oracle 10g XE Server in Oracle? If you have your Oracle 10g XE server running on your local machine, you can connect your Oracle SQL Developer to the server with the following steps: Start Oracle SQL Developer Right-click on Connections Select New Database Connection Enter ... 2019-02-05, 1642🔥, 0💬

Connect to Local 10g XE Server in Oracle
How To Connect to a Local Oracle 10g XE Server in Oracle? If you have your Oracle 10g XE server running on your local machine, you can connect your Oracle SQL Developer to the server with the following steps: Start Oracle SQL Developer Right-click on Connections Select New Database Connection Enter ... 2019-02-05, 1642🔥, 0💬

PL/SQL Functions in Oracle
What Is a Function in Oracle? A function is a named program unit. It consists of three parts: Declaration Part - Defining the function name, calling parameters, return value type, local variables and local procedures. Declaration part is required. Execution Part - Defining execution logic with execu... 2018-11-29, 1642🔥, 0💬

What Is the Implicit Cursor in Oracle
What Is the Implicit Cursor in Oracle? There is only one implicitly cursor in a session. The implicit cursor is the cursor automatically defined by PL/SQL for you. Whenever a SQL statement is executed, this cursor will be assigned to represent the execution of this statement. This implicit cursor is... 2018-02-01, 1642🔥, 0💬

Remove Data Files before Opening a Database in Oracle
How Remove Data Files before Opening a Database in Oracle? Let's say you have a corrupted data file or lost a data file. Oracle can mount the database. But it will not open the database. What you can do is to set the bad data file as offline before opening the database. The tutorial exercise shows y... 2019-04-09, 1641🔥, 0💬

Execute a Stored Procedure in Oracle
How To Execute a Stored Procedure in Oracle? If you want to execute a stored procedure, you can use the EXECUTE statement. The example script below shows how to executes a stored procedure: SQL&gt; set serveroutput on; SQL&gt; CREATE PROCEDURE Greeting AS 2 BEGIN 3 DBMS_OUTPUT.PUT_LINE('Welc... 2018-11-11, 1639🔥, 0💬

Working with Database Objects in Oracle PL/SQL
Where to find answers to frequently asked questions on Working with Database Objects in Oracle PL/SQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Working with Database Objects in Oracle PL/SQL. Clear answers are provided with tutorial exercis... 2018-10-13, 1639🔥, 0💬

What Is NULL in PL/SQL in Oracle
What Is NULL in PL/SQL in Oracle? NULL is a reserved key word and it stands for two things in PL/SQL: NULL is an executable statement, and means doing nothing. NULL is a data value, and means no value. The following sample script shows you examples of using NULL keyword: DECLARE next_task CHAR(80); ... 2018-07-13, 1639🔥, 0💬

Show All User Accounts in Oracle
How To List All User Accounts in Oracle? User accounts can be accessed through a system view called ALL_USERS. A simple SELECT statement can be used to get a list of all user accounts. Try the following script: &gt;.\bin\sqlplus /nolog SQL&gt; connect SYSTEM/fyicenter Connected. SQL&gt; ... 2019-07-21, 1638🔥, 0💬

Managing Oracle Table Indexes
Where to find answers to frequently asked questions on Managing Oracle Table Indexes? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Managing Oracle Table Indexes. The clear answers and sample scripts provided can be used as learning tutorials or... 2019-05-10, 1638🔥, 0💬

Rename a Tablespace in Oracle
How To Rename a Tablespace in Oracle? You can easily rename a tablespace by using the ALTER TABLESPACE ... RENAME TO statement as shown in the example below: SQL&gt; CREATE TABLESPACE my_space 2 DATAFILE '/temp/my_space.dbf' SIZE 10M; Tablespace created. SQL&gt; ALTER TABLESPACE my_space REN... 2019-04-13, 1638🔥, 0💬

Show All Tables in Your Schema in Oracle
How To List All Tables in Your Schema in Oracle? If you log in with your Oracle account, and you want to get a list of all tables in your schema, you can get it through the USER_TABLES view with a SELECT statement, as shown in the following SQL script: SQL&gt; connect HR/fyicenter Connected. SQL... 2019-05-10, 1636🔥, 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, 1636🔥, 0💬

Downloading and Installing MySQL on Windows
Where to find answers to frequently asked questions on Downloading and Installing MySQL on Windows? I want to learn how to install MySQL database. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Downloading and Installing MySQL on Windows. Clear a... 2018-06-12, 1634🔥, 0💬

Revoke CREATE SESSION Privilege in Oracle
How To Revoke CREATE SESSION Privilege from a User in Oracle? If you take away the CREATE SESSION privilege from a user, you can use the REVOKE command as shown in the following example script: &gt;.\bin\sqlplus /nolog SQL&gt; connect SYSTEM/fyicenter SQL&gt; REVOKE CREATE SESSION FROM d... 2019-07-09, 1633🔥, 0💬

Rename an Existing Column in a Table in MySQL
How To Rename an Existing Column in a Table in MySQL? If you have an existing column in a table and you want to change the column name, you can use the "ALTER TABLE ... CHANGE" statement. This statement allows you to change the name of a column, and its definition. The tutorial script below gives yo... 2018-03-04, 1633🔥, 0💬

Database in Use When Renaming a Database in SQL Server
Why I am getting this error when renaming a database in SQL Server? If you are trying to rename a database that is in use, you will get an error message like this: "The database could not be exclusively locked to perform the operation." Before renaming a database, you must stop all client sessions u... 2016-11-20, 1633🔥, 0💬

Attributes of the Implicit Cursor in Oracle
How To Use Attributes of the Implicit Cursor in Oracle? Right after executing a DML statement, you retrieve any attribute of the implicit cursor by using SQL%attribute_name, as shown in the following tutorial exercise: CREATE TABLE student (id NUMBER(5) PRIMARY KEY, first_name VARCHAR(80) NOT NULL, ... 2018-02-01, 1631🔥, 0💬

Difference between CHAR and VARCHAR in MySQL
What Are the Differences between CHAR and VARCHAR in MySQL? CHAR and VARCHAR are both ASCII character data types by default. But they have the following major differences: CHAR stores values in fixed lengths. Values are padded with space characters to match the specified length. VARCHAR stores value... 2018-01-19, 1631🔥, 0💬

Oracle SQL Developer Written in Java in Oracle
Is Oracel SQL Developer written in Java in Oracle? Oracel SQL Developer is written in Java. It requires JDK 1.5, which is already included in your download file.   ⇒ Connect to Local 10g XE Server in Oracle ⇐ Start Oracle SQL Developer in Oracle ⇑ Introduction to Oracle SQL Developer ⇑⇑ Oracle Dat... 2019-02-05, 1630🔥, 0💬

Start Oracle SQL Developer in Oracle
How To Start Oracle SQL Developer in Oracle? To start Oracle SQL Developer, go to \sqldeveloper and click sqldeveloper.exe. The Oracle SQL Developer window shows up. Your copy of Oracle SQL Developer is running now. There will nothing under the Connections icon, because you haven't defined any conne... 2019-02-05, 1630🔥, 0💬

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General MySQL Oracle SQL Server