General MySQL Oracle SQL Server

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MySQL Functions for Encryption and Compression
Where to find reference information and tutorials on MySQL database functions for Encryption and Compression? I want to know how to use COMPRESS(), ENCRYPT() and other related functions. Here is a collection of reference information and tutorials on MySQL database functions for Encryption and Compre... 2025-03-12, 2709🔥, 0💬

SCHEMABINDING - Binding Views to Underlying Tables in SQL Server
How To Bind a View to the Schema of the Underlying Tables in SQL Server? By default, views are not bound to the schema of the underlying tables. This means that SQL Server will allow you to change underlying table's schema any time. For example, you can drop the underlying table while keep the view.... 2016-11-03, 2709🔥, 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, 2709🔥, 0💬

System Requirements for SQL Server 2005 Express Edition in SQL Server
What are the requirements to install SQL Server 2005 Express Edition in SQL Server? The following system requirements cover the SQL Server 2005 Express Edition: Processor 32-bit Processor of 600-megahertz (MHz) or faster Operating System Windows XP with Service Pack 2 or later Windows 2000 Professio... 2016-12-08, 2708🔥, 0💬

"CREATE LOGIN" Statements - Creating a Login in SQL Server
How to create a login to access the database engine using "CREATE LOGIN" statements in SQL Server? This is the first tutorial of a quick lesson on creating login and configure users for databases with Transact-SQL statements. Granting a user access to a database involves three steps. First, you crea... 2016-12-02, 2702🔥, 0💬

Change User Password in Oracle
How To Change User Password in Oracle? If you want to change a user's password, you can log in as SYSTEM and use the ALTER USER command as shown in the following example: &gt;.\bin\sqlplus /nolog SQL&gt; connect SYSTEM/fyicenter Connected. SQL&gt; ALTER USER DEV IDENTIFIED BY beginner; U... 2019-07-09, 2701🔥, 0💬

Count the Number of Rows with SELECT Statements in Oracle
How To Use SELECT Statement to Count the Number of Rows in Oracle? If you want to count the number of rows, you can use the COUNT(*) function in the SELECT clause. The following select statement returns the number of rows in the "department" table: SQL&gt; SELECT COUNT(*) FROM departments; COUNT... 2019-12-19, 2700🔥, 0💬

Query with a Left Outer Join in Oracle
How To Write a Query with a Left Outer Join in Oracle? If you want to query from two tables with a left outer join, you can use the LEFT OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a left outer join from two tables: departments and employees. The join conditi... 2019-10-18, 2700🔥, 0💬

Restore Tables by Copying MyISAM Files in MySQL
How To Restore Tables by Copying MyISAM Table Files in MySQL? If you have old copies of MyISAM table files, you can restore them easily by copying them back to the data directory to replace the current table files. However you may need to shut down MySQL server to do this, because the current table ... 2017-09-01, 2700🔥, 0💬

Entering Binary String Literals in SQL Server Transact-SQL
How To Enter Binary String Literals in SQL Server Transact-SQL? Binary string long values are normally generated by client applications by reading input channels, like image files. But sometimes, you may need to enter some short binary strings as literals. Binary string literals are entered as a str... 2017-04-22, 2699🔥, 0💬

Converting DATETIME and NUMERIC Values in SQL Server
Are DATETIME and NUMERIC Values Convertible in SQL Server Transact-SQL? Are datetime and numeric value convertible? The answer is yes. Here are the main rules on DATATIME and NUMERIC value conversions: During the conversion a DATETIME value will be treated as a NUMERIC value with the number of days ... 2017-02-22, 2695🔥, 0💬

Assign a Tablespace to a User in Oracle
How To Assign a Tablespace to a Users in Oracle? When you create a new user, Oracle will assign the SYSTEM tablespace to the user by default. If you want to change this, you can assign a different table space to a user using the ALTER USER command. The following tutorial exercise changes user dev's ... 2019-06-29, 2693🔥, 0💬

Start a Specific Oracle Instance in Oracle
How To Start a Specific Oracle Instance in Oracle? A simple way to start a specific Oracle instance is to start the instance with the PFILE option as shown in the following example: &gt;.\bin\sqlplus /nolog SQL&gt; CONNECT / AS SYSDBA Connected. SQL&gt; STARTUP NOMOUNT PFILE=$ORACLE_HOME... 2018-05-08, 2693🔥, 0💬

What Is a Result Set Object in MySQL
What Is a Result Set Object in MySQL? A result set object is a logical representation of data rows returned by mysql_query() function on SELECT statements. Every result set object has an internal pointer used to identify the current row in the result set. Once you get a result set object, you can us... 2017-09-20, 2687🔥, 0💬

Invoke the Data Pump Export Utility in Oracle
How To Invoke the Data Pump Export Utility in Oracle? The Data Pump Export utility is distributed as executable file called "expdp.exe". To invoke this utility, you should go to the "bin" directory of your Oracle server installation and run the "expdp" command. Here is tutorial exercise on how to in... 2016-10-15, 2687🔥, 0💬

Scalar Data Types Supported in PL/SQL in Oracle
How Many Scalar Data Types Are Supported in PL/SQL in Oracle? PL/SQL supports many scalar data types divided into 4 groups: Numeric Types: BINARY_DOUBLE, BINARY_FLOAT, BINARY_INTEGER, DEC, DECIMAL, DOUBLE PRECISION, FLOAT, INT, INTEGER, NATURAL, NATURALN, NUMBER, NUMERIC, PLS_INTEGER, POSITIVE, POSI... 2018-11-17, 2684🔥, 0💬

What Is "mysql" Command in MySQL
What Is "mysql" in MySQL? "mysql" is a command-line interface for end users to manage user data objects. You can use "mysql" to run any standard SQL statements against the server. For example, you use the following SQL statements to manage tables and table rows: "CREATE TABLE links (name VARCHAR(80)... 2018-05-19, 2683🔥, 0💬

Open a Cursor Variable in Oracle
How To Open a Cursor Variable in Oracle? A cursor variable must be opened with a specific query statement before you can fetch data fields from its data rows. To open a cursor variable, you can use the OPEN ... FOR statement as shown in the following tutorial exercise: CREATE OR REPLACE PROCEDURE FY... 2018-07-18, 2682🔥, 0💬

Backup Tables by Copying MyISAM Files in MySQL
How To Backup Tables by Copying MyISAM Table Files in MySQL? To easiest way to backup MyISAM tables is to copy the data files to a backup directory. But this is not the recommended way to do backups. Read the backup FAQ collections for more details. The following tutorial exercise shows you how to a... 2017-09-01, 2682🔥, 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, 2681🔥, 0💬

Start an Oracle Instance in Oracle
How To Start an Oracle Instance in Oracle? This is Step 6. Now you are ready to start the new Oracle Instance without any database. This instance will be used to create a database. Starting an instance without database can be done by using STARTUP NOMOUNT statement as shown below: &gt;.\bin\sqlp... 2018-05-08, 2680🔥, 0💬

ODBC Drivers and DSN Configuration for Oracle
Where to find answers to frequently asked questions on ODBC Drivers, DSN Configuration and ASP Connection for Oracle? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team ODBC Drivers, DSN Configuration and ASP Connection for Oracle. Clear answers are pro... 2016-10-15, 2675🔥, 0💬

Text Literals in Oracle
How To Write Text Literals in Oracle? There are several ways to write text literals as shown in the following samples: SELECT 'FYICenter.com' FROM DUAL -- The most common format FYICenter.com SELECT 'It''s Sunday!' FROM DUAL -- Single quote escaped It's Sunday! SELECT N'Allo, C''est moi.' FROM DUAL ... 2020-04-14, 2674🔥, 0💬

What Is a Function 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... 2018-01-27, 2674🔥, 0💬

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General MySQL Oracle SQL Server