General MySQL Oracle SQL Server

<< < … 4 5 6 7 8 9 10 11 12 13 14 … > >>   ∑:1360  Sort:Date

Removed: ENCODE() - Encoding Data with Password
How to encode a byte sequence with a given password using the ENCODE() function? ENCODE(clear, pass) is a MySQL built-in function that encodes a byte sequence with a given password using the default encoding algorithm. Note that ENCODE() is no longer supported. It was: Introduced MySQL 4.0. Removed ... 2024-10-14, 4210🔥, 0💬

ISNULL() - Replacing NULL Values in Expressions in SQL Server
How To Replace NULL Values in Expressions using ISNULL() in SQL Server Transact-SQL? As you learned from previous tutorials, NULL values presented in expressions will cause the final results to be NULL. Sometimes, you want NULL values to be replaced with some default values, like 0, '', or 'NULL', s... 2017-02-03, 4189🔥, 0💬

Use "IN OUT" Parameters in Oracle
How To Use "IN OUT" Parameter Properly in Oracle? Here are the rules about IN OUT parameters: A formal IN OUT parameter acts like an initialized variable. An actual IN OUT parameter must be a variable. An actual IN OUT parameter passes a copy of its value to the formal parameter when entering the pr... 2018-10-19, 4185🔥, 0💬

Show All Tablespaces in the Current Database in Oracle
How To View Tablespaces 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; SELECT TABLESP... 2019-01-20, 4167🔥, 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, 4145🔥, 0💬

Converting Binary Strings into Unicode Character Strings in SQL Server
Can Binary Strings Be Converted into Unicode Character Strings in SQL Server Transact-SQL? Can binary strings be converted into Unicode character strings? The answer is yes. But you need to know how Unicode characters are represented in a binary format. Remember the following simple rules: An ASCII ... 2017-02-28, 4145🔥, 0💬

Define DSN with ODBC Manager in Oracle
How To Define a Data Source Name (DSN) in ODBC Manager in Oracle? DSN (Data Source Name) is an ODBC connection identifier for Windows applications. Here is how you can define a DSN on your Windows system: Go to Control Panel. Go to Administrative Tools. Run Data Sources (ODBC). Go to System DSN tab.... 2016-10-15, 4145🔥, 0💬

mscorsvw.exe - Process - Microsoft .NET Framework NGEN in SQL Server
What is mscorsvw.exe - Process - Microsoft .NET Framework NGEN in SQL Server? Process mscorsvw.exe is installed as a system service as part of the .NET Framework 2.0. You can disable it, if you are not using any applications that require .NET Framework 2.0. mscorsvw.exe process and program file info... 2016-12-08, 4140🔥, 0💬

Change Program Global Area (PGA) in Oracle
How To Change Program Global Area (PGA) in Oracle? Your 10g XE server has a default setting for Program Global Area (PGA) of 40MB. The PGA size can be changed to a new value depending on how much data a single session should be allocated. If you think your session will be short with a small amount o... 2020-09-30, 4136🔥, 0💬

What Are Indexes in SQL Server
What Are Indexes in SQL Server? An index is a secondary database object associated with a table to improve the retrieval performance of rows from that table. An index can be defined for a single column or multiple columns of a given table. If an index is defined on a single column of a table, the in... 2016-11-15, 4126🔥, 0💬

JSON_SET() - Inserting/updating JSON Child Members
How to insert or update child members of a JSON (JavaScript Object Notation) value using the JSON_SET() function? JSON_SET(json, path1, val1, path2, val2, ...) is a MySQL built-in function that inserts child members of a JSON value at given new locations, and replaces child numbers at given existing... 2025-03-12, 4124🔥, 0💬

Save Query Output to a Local File in Oracle
How To Save Query Output to a Local File in Oracle? Normally, when you run a SELECT statement in SQL*Plus, the output will be displayed on your screen. If you want the output to be saved to local file, you can use the "SPOOL fileName" command to specify a local file and start the spooling feature. W... 2020-07-15, 4123🔥, 0💬

Dispaly Part Time in Days, Hours and Minutes in MySQL
How To Display a Past Time in Days, Hours and Minutes in MySQL? You have seen a lots of Websites are displaying past times in days, hours and minutes. If you want to do this yourself, you can use the TIMEDIFF() SQL function. Note that the TIMEDIFF() function can only handle time range within 839 hou... 2017-06-23, 4121🔥, 0💬

Introduction to Command-Line SQL*Plus Client Tool
Where to find answers to frequently asked questions on Command-Line SQL*Plus Client Tool? I want to learn simple ways to run commands on Oracle database server. Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Command-Line SQL*Plus Client Tool. Cle... 2020-08-25, 4117🔥, 0💬

DROP_EXISTING - Recreating an Existing Index in SQL Server
How To Recreate an Existing Index in SQL Server? If you want to change the definition of an existing index, you can use the "DROP INDEX" statement to drop the index first. Then use the "CREATE INDEX" statement to create it again with the new definition. But you can also combine those two statements ... 2016-11-08, 4109🔥, 0💬

Convert Dates to Character Strings in Oracle
How To Convert Dates to Characters in Oracle? You can convert dates to characters using the TO_CHAR() function as shown in the following examples: SELECT TO_CHAR(SYSDATE, 'DD-MON-YYYY') FROM DUAL; -- SYSDATE returns the current date 07-MAY-2006 SELECT TO_CHAR(SYSDATE, 'YYYY/MM/DD') FROM DUAL; 2006/0... 2020-03-25, 4100🔥, 0💬

NULL Values Involved in Arithmetic Operations in SQL Server
What Happens If NULL Values Are Involved in Arithmetic Operations in SQL Server Transact-SQL? If NULL values are involved in arithmetic operations, the result will be numeric NULL values. The following tutorial script shows you some good examples: SELECT 7+NULL; GO ----------- NULL SELECT 10.02*NULL... 2017-02-05, 4074🔥, 0💬

Generate Query Output in HTML Format in Oracle
How To Generate Query Output in HTML Format in Oracle? If you want your query output to be generated in HTML format, you can use the "SET MARKUP HTML ON" to turn on the HTML feature. The following tutorial exercise gives you a good example: SQL&gt; connect HR/retneciyf SQL&gt; SET MARKUP HTM... 2020-07-15, 4031🔥, 0💬

Requirements for SQL*Plus Connection in Oracle
What Information Is Needed to Connect SQL*Plus an Oracle Server in Oracle? If you want to connect your SQL*Plus session to an Oracle server, you need to know the following information about this server: The network hostname, or IP address, of the Oracle server. The network port number where the Orac... 2020-08-25, 4026🔥, 0💬

OFFLINE - Taking a database offline in SQL Server
How to set a database state to OFFLINE in SQL Server? If you want to move database physical files, you should take the database offline by using the "ALTER DATABASE" statement with the following syntax: ALTER DATABASE database_name SET OFFLINE The following tutorial example will bring "FyiCenterComD... 2016-11-20, 4019🔥, 0💬

Introduction to Date and Time Handling in MySQL
Where to find answers to frequently asked questions on Introduction to Date and Time Handling in MySQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Introduction to Date and Time Handling in MySQL. Clear answers are provided with tutorial exerc... 2021-08-04, 4016🔥, 2💬

💬 2021-03-13 Strain John: Hey, u gave us good information. It is easy to understand for everyone and also having good content. I appreciated your afforts ...

What Is a Static Data Dictionary in Oracle
What Is a Static Data Dictionary in Oracle? Data dictionary tables are not directly accessible, but you can access information in them through data dictionary views. To list the data dictionary views available to you, query the view DICTIONARY. Many data dictionary tables have three corresponding vi... 2020-10-26, 4015🔥, 0💬

How To Count Duplicated Values in a Column? in SQL Server
How To Count Duplicated Values in a Column in SQL Server? If you have a column with duplicated values, and you want to know what are those duplicated values are and how many duplicates are there for each of those values, you can use the "GROUP BY ... HAVING" clause as shown in the following example.... 2016-10-25, 4010🔥, 0💬

IS_IPV6() - Detecting IPv6 Address
How to detect an IPv4 Address using the IS_IPV6() function? IS_IPV6(ip) is a MySQL built-in function that returns 1 if the given value is a valid IPv6 address, 0 otherwise. For example: SELECT IS_IPV4('10.0.5.9'), IS_IPV4('10.0.5.256'); -- +---------------------+------- ----------------+-- | IS_IPV4... 2026-01-24, 4007🔥, 0💬

<< < … 4 5 6 7 8 9 10 11 12 13 14 … > >>   ∑:1360  Sort:Date

General MySQL Oracle SQL Server