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Adding More Data to the Test Table in MySQL
How To Add More Data to the Testing Table in MySQL? If you want to continue with other tutorial exercises in this FAQ collection, you need to add more data to the testing table. Follow the script below to add a new column and: mysql&gt; ALTER TABLE fyi_links ADD COLUMN tag VARCHAR(8); mysql&...
2017-11-02, 374👍, 0💬

LIKE - Matching a Pattern in a Character String in SQL Server
What To Perform Pattern Match with the LIKE Operator in SQL Server Transact-SQL? Pattern match is a very important operation for search records base on character string columns. SQL Server 2005 offers the LIKE operator to perform pattern match operations in two formats: target_string LIKE pattern --...
2017-01-21, 374👍, 0💬

"LEFT OUTER JOIN ... ON" - Writing Queries with Left Outer Joins in SQL Server
How To Write a Query with a Left Outer Join in SQL Server? 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: fyi_links and fyi_rates. The join condi...
2016-10-30, 374👍, 0💬

System Databases Used by SQL Servers in SQL Server
What are system databases in SQL Server? System databases are created by the SQL Server itself during the installation process. System databases are used by the SQL server to help manage other user databases and client execution sessions. SQL Server 2005 Express Edition uses 4 system databases: mast...
2016-11-20, 373👍, 0💬

DEFAULT - Providing Default Values to Function Parameters in SQL Server
How To Provide Default Values to Function Parameters in SQL Server Transact-SQL? If you add a parameter when creating a stored procedure, you can provide a default value so that the execution statement is not required to pass input value to this parameter: To define a default value to a parameter wh...
2016-12-18, 372👍, 0💬

"DROP" Statements - Deleting database objects in SQL Server
How to delete database objects with "DROP" statements in SQL Server? To remove all database objects created by previous tutorials, you could just delete the database. However, in this tutorial, you will go through the steps to reverse every action you took doing the tutorial. Removing permissions an...
2016-11-27, 372👍, 0💬

What Are DDL Statements in MySQL
What Are DDL Statements in MySQL? DDL (Data Definition Language) statements are statements to create and manage data objects in the database. The are 3 primary DDL statements: CREATE - Creating a new database object. ALTER - Altering the definition of an existing data object. DROP - Dropping an exis...
2018-03-10, 371👍, 0💬

Server Daemon mysqld Administration in MySQL
Where to find answers to frequently asked questions on Server Daemon mysqld Administration in MySQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Server Daemon mysqld Administration in MySQL. Clear answers are provided with tutorial exercises o...
2017-12-09, 371👍, 0💬

Using Subqueries with the EXISTS Operator in MySQL
How To Use Subqueries with the EXISTS Operator in MySQL? A subquery can be used with the EXISTS operator as "EXISTS (subquery)", which returns true if the subquery returns one or more rows. The following statement is a good example of "EXISTS (subquery)". It returns rows from fyi_links table that th...
2017-09-17, 371👍, 0💬

Major Storage Engines Supported in MySQL in MySQL
What Are Storage Engines in MySQL? Storage engines are programs that are integrated into MySQL database management system to manage data tables. MySQL 5.0 supports the following major storage engines: MyISAM Storage Engine - MySQL default storage engine. Based on ISAM database concept. MyISAM is not...
2017-09-12, 371👍, 0💬

IN - Testing Value in a Value List in SQL Server
What To Test Value Lists with the IN Operator in SQL Server Transact-SQL? Sometimes you want to test a given value against a list of values. You can do this in a loop with the regular "equal" operator. But you can also use the special comparison operator IN to get it done with the following syntaxes...
2017-01-21, 371👍, 0💬

Viewing Log File with "mysqlbinlog" in MySQL
How To Use mysqlbinlog to View Binary Logs in MySQL? If you have binary logs turned on, you can use "mysqlbinlog" to view the binary log files. The tutorial exercise below shows you how to view two binary files together: &gt;cd \mysql\bin &gt;mysql -u root -pretneciyf test &gt;mysqlbinlo...
2017-11-29, 370👍, 0💬

Query with a Full Outer Join in MySQL
How To Write a Query with a Full Outer Join in MySQL? There is no way to do full outer join in MySQL. It does not support this feature at the current MySQL release.   ⇒SELECT Statements with JOIN and Subqueries in MySQL ⇒⇒MySQL Database Tutorials
2017-09-28, 370👍, 0💬

Key Word Search in Tables in MySQL
How To Perform Key Word Search in Tables in MySQL? The simplest way to perform key word search is to use the SELECT statement with a LIKE operator in the WHERE clause. The LIKE operator allows you to match a text field with a keyword pattern specified as '%keyword%', where (%) represents any number ...
2017-06-23, 370👍, 0💬

Syntaxes of Creating Table-Valued Functions in SQL Server
How Many Ways to Create Table-Valued Functions in SQL Server Transact-SQL? SQL Server supports two syntaxes of creating table-valued functions: 1. Inline Table-valued Functions - A table-valued function created with a single SELECT statement: CREATE FUNCTION function_name( @parameter_1 data_type, @p...
2016-12-18, 370👍, 0💬

Generating CREATE TABLE Script on Existing Tables in SQL Server
How To Generate CREATE TABLE Script on an Existing Table in SQL Server? If you want to know how an existing table was created, you can use SQL Server Management Studio to automatically generate a "CREATE TABLE" script The following tutorial shows you how to do this: 1. Run SQL Server Management Stud...
2016-11-17, 370👍, 0💬

"ALTER AUTHORIZATION" - Changing the Ownership of a Schema in SQL Server
How To Change the Ownership of a Schema in SQL Server? If you want to change the owner of a schema, you can use the "ALTER AUTHORIZATION" statement using the following syntax: ALTER AUTHORIZATION ON SCHEMA::schema_name TO user_name The following tutorial example shows you how to change ownership of ...
2016-10-22, 370👍, 0💬

Show CREATE TABLE Statements of Existing Tables in MySQL
How To See the CREATE TABLE Statement of an Existing Table in MySQL? If you want to know how an existing table was created, you can use the "SHOW CREATE TABLE" command to get a copy of the "CREATE TABLE" statement back on an existing table. The following tutorial script shows you a good example: mys...
2018-03-04, 369👍, 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, 369👍, 0💬

What Are User Defined Functions in SQL Server
What Are User Defined Functions in SQL Server Transact-SQL? A user defined function is a collection of Transact-SQL statements that stored in the SQL Server. A user defined function will return data when executed. A user defined function works in the same way as a system function. It can be used as ...
2016-12-28, 369👍, 0💬

Use an Explicit Cursor without OPEN Statements in Oracle
How To Use an Explicit Cursor without OPEN Statements in Oracle? If you want to open a cursor and loop through its data rows in quick way, you can use the FOR ... IN ... LOOP statement in the same way as the implicit cursor. The following tutorial exercise gives you a good example: CREATE OR REPLACE...
2018-04-07, 368👍, 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, 368👍, 0💬

Date and Time Data Types in MySQL
What Are Date and Time Data Types in MySQL? MySQL supports the following date and time data types: DATE - A date in the range of '1000-01-01' and '9999-12-31'. Default DATE format is "YYYY-MM-DD". DATETIME - A date with the time of day in the range of '1000-01-01 00:00:00' and '9999-12-31 23:59:59'....
2018-01-19, 368👍, 0💬

Violation of Unique Value Constraint in MySQL
What Happens If Unique Value Constraints Are Violated in MySQL? If you are inserting a new record that has values violating a unique constraint, you will get an error. Note that primary key column has a unique value constraint by default. The following tutorial exercise gives you some good examples:...
2018-01-16, 368👍, 0💬

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