General MySQL Oracle SQL Server

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ROUND() - Rounding Values to Specific Precisions in SQL Server
How To Round a Numeric Value To a Specific Precision in SQL Server Transact-SQL? Sometimes you need to round a numeric value to a specific precision. For example, you may want to round values in your financial statement to the precision of 1000.00. This can be done by the ROUND() function with the f... 2017-03-11, 6818🔥, 0💬

Converting Binary Strings into Integers in SQL Server
How To Convert Binary Strings into Integers in SQL Server Transact-SQL? Binary strings and integers are convertible implicitly and explicitly. But there several rules you need to remember: Binary strings will be implicitly converted into an integer data type, if it is involved in an arithmetical ope... 2017-02-28, 6749🔥, 0💬

Show Privileges of the Current User in Oracle
How To Find Out What Privileges a User Currently Has in Oracle? Privileges granted to users are listed in two system views: DBA_SYS_PRIVS, and USER_SYS_PRIVS. You can find out what privileges a user currently has by running a query on those views as shown in the tutorial exercise below: &gt;.\bi... 2019-06-11, 6736🔥, 0💬

Downloading and Installing Microsoft .NET Framework Version 2.0 in SQL Server
How to download and install Microsoft .NET Framework Version 2.0 in SQL Server? .NET Framework Version 2.0 is required by many Microsoft applications like SQL Server 2005. If you want download and install .NET Framework Version 2.0, you should follow this tutorial: 1. Go to the Microsoft .NET Framew... 2016-12-08, 6727🔥, 0💬

"IF ... ELSE IF ..." Statement Structures in SQL Server
How To Use "IF ... ELSE IF ..." Statement Structures in SQL Server Transact-SQL? "IF ... ELSE IF ..." statement structure is used to select one of the specified statements to be executed based on specified Boolean conditions. Here is the syntax of "IF ... ELSE IF ..." statement structure: IF conditi... 2017-01-11, 6615🔥, 0💬

DYNAMIC - Creating Dynamic Cursors in SQL Server
How To Create a Dynamic Cursor with the DYNAMIC Option in SQL Server Transact-SQL? If the underlying table is changed after the cursor is opened, should the changes be reflected in the cursor result set? The answer is based on the update option used when creating the cursor. SQL SERVER supports two ... 2016-10-17, 6545🔥, 0💬

FLOOR, CEILING, ROUND - Converting Values to Integers in SQL Server
How To Convert Numeric Values to Integers in SQL Server Transact-SQL? Sometimes you need to round a numeric value into an integer. SQL Server 2005 offers you a number of ways to do this: FLOOR(value) - Returning the largest integer less than or equal to the input value. The returning data type is th... 2017-03-22, 6544🔥, 0💬

Privilege to Delete Rows in Another Schema in Oracle
What Privilege Is Needed for a User to Delete Rows from Tables in Another Schema in Oracle? For a user to delete rows from tables of someone else's schema, he/she needs the DELETE ANY TABLE privilege. The following tutorial exercise gives you a good example of granting "dev" to delete rows in "hr" s... 2019-06-11, 6514🔥, 0💬

Oracle Database Basic Concepts
Where to find answers to frequently asked questions I am new to Oracle database. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team about Oracle database basic concepts: What Is Oracle in Oracle What Is an Oracle Database in Oracle What Is an Oracle Ins... 2025-09-18, 6510🔥, 1💬

Error: Imported Table Already Exists in Oracle
What Happens If the Imported Table Already Exists in Oracle? If the import process tries to import a table that already exists, the Data Pump Import utility will return an error and skip this table. The following exercise shows you a good example: &gt;cd \oraclexe\app\oracle\product\1 0.2.0\serve... 2016-10-15, 6509🔥, 0💬

JSON_OVERLAPS() - Checking JSON Overlaps
How to check if two JSON values have overlaps using the JSON_OVERLAPS() function? JSON_OVERLAPS(json1, json2) is a MySQL built-in function that detects overlaps of two JSON values using the following rules: If both arguments are objects, overlap means they have at least one key-value pair in common.... 2024-12-18, 6429🔥, 0💬

Show All Data Files in the Current Database in Oracle
How To View Data Files in the Current Database in Oracle? If you want to get a list of all tablespaces used in the current database instance, you can use the DBA_TABLESPACES view as shown in the following SQL script example: SQL&gt; connect SYSTEM/fyicenter Connected. SQL&gt; col tablespace_... 2019-04-13, 6392🔥, 0💬

NULLIF() - Replacing Given Values with NULL in SQL Server
How To Replace Given Values with NULL using NULLIF() in SQL Server Transact-SQL? Sometime you want to hide certain values by replacing them with NULL values. SQL Server offers you a nice function called NULLIF() to do this: NULLIF(expression, value) -- Returns NULL if "expression" equals to value" -... 2017-01-29, 6294🔥, 0💬

Converting Numeric Values to Character Strings in MySQL
How To Convert Numeric Values to Character Strings in MySQL? You can convert numeric values to character strings by using the CAST(value AS CHAR) function as shown in the following examples: SELECT CAST(4123.45700 AS CHAR) FROM DUAL; 4123.45700 -- How to get rid of the last 2 '0's? SELECT CAST(4.123... 2018-03-28, 6266🔥, 0💬

Installing PHP on Windows in MySQL
How To Install PHP on Windows in MySQL? The best way to download and install PHP on Windows systems is to: Go to http://www.php.net, which is the official Web site for PHP. Download PHP binary version for Windows in ZIP format. Unzip the downloaded file into a directory. You are done. No need to run... 2017-07-30, 6148🔥, 0💬

Recover a Dropped Index in Oracle
How To Recover a Dropped Index in Oracle? If you have the recycle bin feature turned on, dropped indexes are stored in the recycle bin. But it seems to be command to restore a dropped index out of the recycle bin. FLASHBACK INDEX is not a valid statement. See the following script: ALTER SESSION SET ... 2019-04-22, 6027🔥, 0💬

"ALTER USER" - Changing the Name of a Database User in SQL Server
How To Change the Name of a Database User in SQL Server? If you want to change the name of an existing database user, you can use the "ALTER USER" statement as shown in the tutorial exercise below: -- Login with "sa" USE FyiCenterData; GO ALTER USER Fyi_User WITH NAME = Dba_User; GO -- List all user... 2022-01-24, 5968🔥, 0💬

Start with a Minimum Initialization Parameter File in Oracle
How To Start Instance with a Minimal Initialization Parameter File in Oracle? The sample initialization parameter file provided by Oracle seems to be not working. But we can try to start the new instance with a minimal initialization parameter file (PFile). First you can create another PFile, $ORACL... 2018-05-08, 5945🔥, 0💬

Connect ASP Pages to Oracle Servers in Oracle
How To Connect ASP Pages to Oracle Servers in Oracle? If you are running Windows IIS Web server and serving ASP Web pages, you can get data from Oracle servers into your ASP pages through ODBC drivers. To do this, you need to install the correct Oracle ODBC driver and define a DSN on the IIS Web ser... 2016-10-15, 5884🔥, 0💬

Selecting All Columns of All Rows from a Table in SQL Server
How To Select All Columns of All Rows from a Table with a SELECT statement in SQL Server? The simplest query statement is the one that selects all columns of all rows from a single table: "SELECT * FROM tableName". The (*) in the SELECT clause tells the query to return all columns. The missing WHERE... 2016-10-26, 5797🔥, 0💬

Converting Unicode Strings to Non-Unicode Strings in SQL Server
How To Convert a Unicode Strings to Non-Unicode Strings in SQL Server Transact-SQL? Since Unicode character set is different than code page based (non-Unicode) character set, converting Unicode strings to non-Unicode strings may result in wrong characters or missing characters. So you should avoid c... 2017-03-07, 5789🔥, 0💬

Connecting SQL Server Management Studio Express To a SQL Server in SQL Server
How to connect SQL Server Management Studio Express to SQL Server 2005 Express in SQL Server? Once you have SQL Server 2005 Express installed and running on your local machine, you are ready to connect SQL Server Management Studio Express to the server: Click Start &gt; Programs &gt; Microso... 2016-12-04, 5779🔥, 0💬

"USE" - Setting the Current Database in SQL Server
How to set the current database in SQL Server? Once you are connected to the SQL Server, you should select a database to work with and set it as the current database using the "USE" statement with this syntax: USE database_name The following tutorial example shows you how to set "FyiCenterData" as t... 2016-11-24, 5761🔥, 0💬

Difference Between GETDATE() and GETUTCDATE() in SQL Server
What Is the Difference Between GETDATE() and GETUTCDATE() in SQL Server Transact-SQL? The difference between GETDATE() and GETUTCDATE() is time zone number of the SQL Server machine. The tutorial exercise below gives you a good example: DECLARE @local_time DATETIME; DECLARE @gmt_time DATETIME; SET @... 2017-02-14, 5722🔥, 0💬

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General MySQL Oracle SQL Server