General MySQL Oracle SQL Server

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Types of Data Literals in SQL Server Transact-SQL
What are different types of data literals supported in SQL Server Transact-SQL? There are 8 types of data literals supported in SQL Server Transact-SQL: 1. Integer Number Literals - Sequences of numbers prefixed with +/- sign if needed. Integer number literals are used to represent integer values. F... 2017-05-20, 2866🔥, 0💬

"GRANT EXECUTE" Statements - Granting EXECUTE permission in SQL Server
How to grant a permission using "GRANT EXECUTE" statements in SQL Server? This is the fourth 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 create a login. The login le... 2016-11-27, 2864🔥, 0💬

Updating Existing Rows in MySQL
How To Update Existing Rows in a Table in MySQL? Updating existing rows in a table requires to run the UPDATE statement with a WHERE clause to identify the row. The following sample script updates one row with two new values: &lt;?php include "mysql_connection.php"; $sql = "UPDATE fyi_links SET ... 2023-09-10, 2863🔥, 1💬

💬 2023-09-10 Pintu kumar: To update existing rows in a table in MySQL, you can use the UPDATE statement. Here's a general syntax for updating rows in MySQ...

Select Some Rows from a Table in Oracle
How To Select Some Rows from a Table in Oracle? If you don't want select all rows from a table, you can specify a WHERE clause to tell the query to return only the rows that meets the condition defined in the WHERE clause. The following select statement only returns rows that has department name sta... 2019-12-19, 2863🔥, 0💬

Use Windows User to Connect to the Server in Oracle
How To Use Windows User to Connect to the Server in Oracle? During the installation process, 10g XE will create a special Windows user group called ORA_DBA, and put your Windows user into this group. Any Windows users in this group can be connected to Oracle server with SYSDBA privilege without any ... 2019-07-21, 2863🔥, 0💬

Declare Local Variables in Oracle
How To Declare a Local Variable in Oracle? A local variable can be defined in the declaration part with a declaration statement, which is a variable name followed a data type identifier. Below are some examples of declaration statements: PROCEDURE proc_var_1 AS domain VARCHAR2(80); price REAL; is_fo... 2018-11-17, 2863🔥, 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, 2863🔥, 0💬

Managing Tables and Running Queries with PHP for MySQL
Where to find answers to frequently asked questions on Managing Tables and Running Queries with PHP for MySQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Managing Tables and Running Queries with PHP for MySQL. Clear explanations and tutorial ... 2017-10-08, 2861🔥, 0💬

Login to Server without an Instance in Oracle
How To Login to the Server without an Instance in Oracle? If your default instance is in trouble, and you can not use the normal login process to reach the server, you can use a special login to log into the server without any instance. Here is how to use SQL*Plus to log in as a system BDA: &gt;... 2020-09-15, 2858🔥, 0💬

Add a New Column to an Existing Table with a Default Value in Oracle
How To Add a New Column to an Existing Table with a Default Value in Oracle? If you want to add a new column to an existing table, and insert a default value in this column on all existing data rows, you can use the ALTER TABLE ... ADD statement with the DEFAULT clause. Here is an example script: SQ... 2019-05-25, 2858🔥, 0💬

Start the Default Instance in Oracle
How To Use "startup" Command to Start Default Instance in Oracle? If you logged in to the server as a SYSDBA, you start the default instance with the "startup" command. Here is how to start the default instance in SQL*Plus in SYSDBA mode: &gt;.\bin\sqlplus Enter user-name: SYSTEM/fyicenter AS SY... 2020-09-15, 2856🔥, 0💬

Entering Characters as HEX Numbers in MySQL
How To Enter Characters as HEX Numbers in MySQL? If you want to enter characters as HEX numbers, you can quote HEX numbers with single quotes and a prefix of (X), or just prefix HEX numbers with (0x). A HEX number string will be automatically converted into a character string, if the expression cont... 2018-03-31, 2856🔥, 0💬

Instance Settings Stored in SPFile in Oracle
Where Are the Settings Stored for Each Instance in Oracle? Settings for each instance are stored in a file called Server Parameter File (SPFile). Oracle supports two types of parameter files, Text type, and Binary type. parameter files should be located in $ORACLE_HOME\database directory. A paramete... 2020-09-15, 2853🔥, 0💬

Use LIKE Conditions in Oracle
How To Use LIKE Conditions in Oracle? LIKE condition is also called pattern patch. There 3 main rules on using LIKE condition: '_' is used in the pattern to match any one character. '%' is used in the pattern to match any zero or more characters. ESCAPE clause is used to provide the escape character... 2020-03-15, 2853🔥, 0💬

ANSI Data Types in Oracle
What Are the ANSI Data Types Supported in Oracle in Oracle? The following ANSI data types are supported in Oracle: CHARACTER(n) / CHAR(n) CHARACTER VARYING(n) / CHAR VARYING(n) NATIONAL CHARACTER(n) / NATIONAL CHAR(n) / NCHAR(n) NATIONAL CHARACTER VARYING(n) / NATIONAL CHAR VARYING(n) / NCHAR VARYIN... 2020-04-14, 2850🔥, 0💬

Oracle Built-in Data Types in Oracle
What Are the Oracle Built-in Data Types in Oracle? There are 20 Oracle built-in data types, divided into 6 groups: Character Datatypes - CHAR, NCHAR, NVARCHAR2, VARCHAR2 Number Datatypes - NUMBER, BINARY_FLOAT, BINARY_DOUBLE Long and Row Datatypes - LONG, LONG RAW, RAW Datetime Datatypes - DATE, TIM... 2020-05-29, 2849🔥, 0💬

Loading and Exporting Data in Oracle
Where to find answers to frequently asked questions on Loading and Exporting Data in Oracle? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Loading and Exporting Data in Oracle. Clear answers are provided with tutorial exercises on saving data as... 2018-06-27, 2849🔥, 0💬

Connecting to MySQL Server on a Specific Port in MySQL
How To Connect to MySQL Server on a Different Port in MySQL? If your MySQL server is listening on port number different than 3306, you need to specify "--port=portNumber" option to any client program that needs to connect to the server. The tutorial exercise shows you how to connect "mysql" to start... 2017-11-25, 2849🔥, 0💬

What Is a Directory Object in Oracle
What Is a Directory Object in Oracle? A directory object is a logical alias for a physical directory path name on the operating system. Directory objects can be created, dropped, and granted access permissions to different users. The following tutorial exercise shows you some good examples: &gt;... 2016-10-15, 2849🔥, 0💬

Configuring ODBC Connection and DSN for SQL Servers
A collection of 13 FAQs on connecting SQL Server via an ODBC DSN setting. Clear explanations and tutorial exercises are provided on creating new DSN with the SQL Server ODBC driver; starting SQL Server Browser Service; enabling TCP/IP protocol on SQL Server; verifying TCP/IP port numbers; testing OD... 2024-08-14, 2845🔥, 0💬

Concatenating Two Binary Strings in SQL Server
How To Concatenate Two Binary Strings Together in SQL Server Transact-SQL? SQL Server 2005 allows to concatenate two binary strings into a single string with the (+) operator. The following tutorial exercise shows you some binary string concatenation examples: -- Concatenating two binary string lite... 2017-03-07, 2845🔥, 0💬

Create a New Data File in Oracle
How To Create a New Oracle Data File in Oracle? There is no dedicated statement to create a data file. Data files are created as part of statements that manages other data structures, like tablespace and database.   ⇒ Create a New Tablespace in Oracle ⇐ Show All Data Files in the Current Database i... 2019-04-13, 2844🔥, 0💬

Enter Comments in PL/SQL in Oracle
How To Enter Comments in PL/SQL in Oracle? There are two ways to enter comments into PL/SQL codes: SQL Statement Style: Starts you comment any where in the line but prefixed with '--'. The comment ends at the end of the line. C Language Style: Starts you comment any where in the line with '/*' and e... 2018-12-26, 2844🔥, 0💬

Divide Query Output into Groups in Oracle
How To Divide Query Output into Groups in Oracle? You can divide query output into multiple groups with the GROUP BY clause. It allows you specify a column as the grouping criteria, so that rows with the same value in the column will be considered as a single group. When the GROUP BY clause is speci... 2019-11-21, 2842🔥, 0💬

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General MySQL Oracle SQL Server