General MySQL Oracle SQL Server

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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, 4763🔥, 0💬

CONVERT() - Converting Character Strings to Numeric Values in SQL Server
How To Convert Character Strings into Numeric Values in SQL Server Transact-SQL? Sometimes you need to convert numeric values enclosed in character strings back to numeric values by using the CONVERT() function. When converting character strings to values with CONVERT(), you need to remember two rul... 2017-03-22, 4758🔥, 0💬

DATEDIFF() - Calculating DATETIME Value Differences in SQL Server
How To Calculate DATETIME Value Differences Using the DATEDIFF() Function in SQL Server Transact-SQL? If you want to calculate the difference between two date and time values, you can use the DATEDIFF() function in the following format: DATEDIFF(datepart, startdate, enddate) returns INT: "startdate"... 2017-02-20, 4753🔥, 0💬

CREATE, ALTER and DROP Statements in MySQL
Where to find answers to frequently asked questions on CREATE, ALTER and DROP Statements in MySQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on CREATE, ALTER and DROP Statements in MySQL. Clear answers are provided with tutorial exercises on cr... 2018-03-13, 4748🔥, 0💬

"sys.tables" - Getting a List of All Tables in SQL Server
How To Get a List of All Tables with "sys.tables" View in SQL Server? If you want to see the table you have just created, you can use the "sys.tables" system view to get a list of all tables in the current database. The tutorial script gives you a good example: SELECT name, type_desc, create_date FR... 2018-03-29, 4724🔥, 1💬

💬 2018-03-29 Eric: That works. Thanks!

What Is an Oracle Instance in Oracle
What Is an Oracle Instance in Oracle? Every running Oracle database is associated with an Oracle instance. When a database is started on a database server (regardless of the type of computer), Oracle allocates a memory area called the System Global Area (SGA) and starts one or more Oracle processes.... 2020-11-11, 4721🔥, 0💬

sys.sql_modules - Getting View Definitions Back in SQL Server
How To Get the Definition of a View Out of the SQL Server in SQL Server? If you want get the definition of an existing view back from the SQL Server, you can use the system view called sys.sql_modules, which stores definitions of views and procedures. The sys.sql_modules holds view definitions ident... 2016-11-05, 4718🔥, 0💬

Connect to Oracle Server as SYSDBA in Oracle
How To Connect the Oracle Server as SYSDBA in Oracle? This is Step 4. The best way to connect to the Oracle server as an administrator is to use SQL*Plus. You need to run SQL*Plus with /nolog option and use the CONNECT with blank user name, blank password and AS SYSDBA option. Here is a sample sessi... 2019-04-03, 4712🔥, 0💬

What Is "mysqld" Command in MySQL
What Is "mysqld" in MySQL? "mysqld" is MySQL server daemon program which runs quietly in background on your computer system. Invoking "mysqld" will start the MySQL server on your system. Terminating "mysqld" will shutdown the MySQL server. Here is a tutorial example of invoking "mysqld" with the "--... 2018-06-01, 4704🔥, 0💬

Drop a Stored Procedure in Oracle
How To Drop a Stored Procedure in Oracle? If there is an existing stored procedure and you don't want it any more, you can remove it from the database by using the DROP PROCEDURE statement as shown in the following script example: SQL&gt; CREATE PROCEDURE Greeting AS 2 BEGIN 3 DBMS_OUTPUT.PUT_LI... 2018-11-11, 4695🔥, 0💬

What Is an Oracle Tablespace in Oracle
What Is an Oracle Tablespace in Oracle? An Oracle tablespace is a big unit of logical storage in an Oracle database. It is managed and used by the Oracle server to store structures data objects, like tables and indexes. Each tablespace in an Oracle database consists of one or more files called dataf... 2020-10-26, 4673🔥, 1💬

💬 2018-10-15 taj mure: Nicerere

Difference between BINARY and VARBINARY in MySQL
What Are the Differences between BINARY and VARBINARY in MySQL? Both BINARY and VARBINARY are both binary byte data types. But they have the following major differences: BINARY stores values in fixed lengths. Values are padded with 0x00. VARBINARY stores values in variable lengths. Values are not pa... 2018-01-19, 4671🔥, 0💬

Transaction Committed when START TRANSACTION Executed in MySQL
What Happens to the Current Transaction If a START TRANSACTION Is Executed in MySQL? If you are in a middle of a current transaction, and a START TRANSACTION command is executed, the current transaction will be committed and ended. All the database changes made in the current transaction will become... 2016-10-17, 4670🔥, 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, 4651🔥, 0💬

Storage Engines: MyISAM, InnoDB and BDB in MySQL
Where to find answers to frequently asked questions on Storage Engines: MyISAM, InnoDB and BDB in MySQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Storage Engines: MyISAM, InnoDB and BDB in MySQL. Clear explanations and tutorial exercises ar... 2017-09-12, 4635🔥, 0💬

Arithmetic Operations with Different Data Types in SQL Server
What Happens to an Arithmetic Operation with Two Different Data Types in SQL Server Transact-SQL? When two expressions with different data types are put together for an arithmetic operation, the expression with a lower rank data type will be converted automatically to higher rank data type. Usually,... 2017-03-27, 4634🔥, 0💬

sys.sql_modules - Getting User Defined Function Definitions Back in SQL Server
How To Get the Definition of a User Defined Function Back in SQL Server Transact-SQL? If you want get the definition of an existing user defined function back from the SQL Server, you can use the system view called sys.sql_modules, which stores definitions of functions, stored procedures, and views.... 2016-12-18, 4582🔥, 0💬

CONVERT() - Converting Numeric Expression Data Types in SQL Server
How To Convert Numeric Expression Data Types using the CONVERT() Function in SQL Server Transact-SQL? If you want to convert the data type of a numeric expression to a new data type, you can use the CONVERT(data_type, expression) function. The tutorial exercise below shows you how to use the CONVERT... 2017-03-27, 4567🔥, 0💬

Select All Columns of All Rows in Oracle
How To Select All Columns of All Rows from a Table in Oracle? The simplest query statement is the one that selects all columns of all rows from a table: "SELECT * FROM table_name;". The (*) in the SELECT clause tells the query to return all columns. The tutorial exercise below gives you a good examp... 2019-12-19, 4530🔥, 0💬

Presenting a Past Time in Hours, Minutes and Seconds in MySQL
How To Present a Past Time in Hours, Minutes and Seconds in MySQL? If you want show an article was posted "n hours n minutes and n seconds ago", you can use the TIMEDIFF(NOW(), pastTime) function as shown in the following tutorial exercise: SELECT TIMEDIFF(NOW(), '2006-07-01 04:09:49') FROM DUAL; 06... 2017-12-26, 4530🔥, 0💬

SQL*Plus Commands Stored in a File in Oracle
How Run SQL*Plus Commands That Are Stored in a Local File in Oracle? If you have a group of commands that you need to run them repeatedly every day, you can save those commands in a file (called SQL script file), and using the "@fileName" command to run them in SQL*Plus. If you want to try this, cre... 2020-06-08, 4518🔥, 0💬

BEGIN ... END Statement Blocks in SQL Server Transact-SQL
How to put statements into a statement block in SQL Server Transact-SQL? You can put statements into a statement block with BEGIN and END key words in Transact-SQL using these syntaxes BEGIN statement_1 statement_2 ... END Statement blocks are mainly used with logical conditions and control-of-flow ... 2017-01-11, 4515🔥, 0💬

SQL Server Transact-SQL Language References
Where to find SQL Server Transact-SQL language references? You can find SQL Server Transact-SQL language references on Microsoft Website: Transact-SQL Reference for SQL Server 2016 Transact-SQL Reference for SQL Server 2014 Transact-SQL Reference for SQL Server 2012 Transact-SQL Reference for SQL Se... 2017-05-20, 4514🔥, 0💬

Converting Binary Strings into NUMERIC or FLOAT in SQL Server
Can Binary Strings Be Converted into NUMERIC or FLOAT Data Types in SQL Server Transact-SQL? Can binary strings be converted into numeric or float data types? The answer is no. Binary strings can not be converted implicitly or explicitly into NUMERIC, DECIMAL, REAL, or FLOAT data types. The tutorial... 2017-02-28, 4513🔥, 0💬

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General MySQL Oracle SQL Server