General MySQL Oracle SQL Server

<< < … 3 4 5 6 7 8 9 10 11 12 13 … > >>   ∑:1357  Sort:Date

Show Table Columns Used in an Index in Oracle
How To See the Table Columns Used in an Index in Oracle? You can a list of indexes in your schema from the USER_INDEXES view, but it will not give you the columns used in each index in the USER_INDEXES view. If you want to see the columns used in an index, you can use the USER_IND_COLUMNS view. Here... 2019-04-17, 3923🔥, 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, 3910🔥, 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, 3902🔥, 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, 3893🔥, 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, 3880🔥, 0💬

Locks, Timeouts, and Deadlocks in MySQL
What Are Impacts on Applications from Locks, Timeouts, and DeadLocks in MySQL? If you are using transactions with REPEATABLE READ isolation level and transaction safe storage engines in your applications, data locks, lock timeouts, and dead lock detections will impact your application in a concurren... 2017-07-21, 3860🔥, 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, 3858🔥, 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, 3850🔥, 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, 3849🔥, 0💬

Change Transaction Isolation Level in MySQL
How To View and Change the Current Transaction Isolation Level in MySQL? If you want to view or change the current transaction isolation level, you can use the following commands: SELECT @@TX_ISOLATION FROM DUAL; -- Viewing the current transaction isolation level. SET TRANSACTION ISOLATION LEVEL lev... 2017-08-08, 3822🔥, 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, 3818🔥, 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, 3817🔥, 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, 3813🔥, 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, 3780🔥, 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 ...

Understanding SQL Transaction Management in Oracle
Where to find answers to frequently asked questions on SQL Transaction Management in Oracle? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on SQL Transaction Management in Oracle. Clear answers are provided with tutorial exercises on starting and e... 2019-09-16, 3779🔥, 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, 3777🔥, 0💬

Date/Time Operations and Functions in SQL Server Transact-SQL
Where to find answers to frequently asked questions on Date/Time Operations and Functions in SQL Server Transact-SQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Date/Time Operations and Functions in SQL Server Transact-SQL. Clear answers are ... 2017-02-25, 3776🔥, 0💬

Query Multiple Tables Jointly in MySQL
How To Query Multiple Tables Jointly in MySQL? If you want to query information stored in multiple tables, you can use the SELECT statement with a WHERE condition to make an inner join. Assuming that you have 3 tables in a forum system: "users" for user profile, "forums" for forums information, and ... 2017-06-23, 3773🔥, 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, 3772🔥, 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, 3769🔥, 0💬

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, 3767🔥, 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, 3759🔥, 0💬

What Is a Database Table in Oracle
What Is a Database Table in Oracle? A database table is a basic unit of data logical storage in an Oracle database. Data is stored in rows and columns. You define a table with a table name, such as employees, and a set of columns. You give each column a column name, such as employee_id, last_name, a... 2020-11-22, 3745🔥, 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, 3741🔥, 0💬

<< < … 3 4 5 6 7 8 9 10 11 12 13 … > >>   ∑:1357  Sort:Date

General MySQL Oracle SQL Server