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Mysql related published Questions

#Question# What is tinyint in mysql?

#Answer#

Taksh Devan answered


A 1-byte integer data type used in CREATE TABLE and ALTER TABLE statements. 2 Integer Types (Exact Value) - INTEGER, INT, SMALLINT, TINYINT, MEDIUMINT , BIGINT. The basic difference between Boolean and tinyint(1) is only in the naming convention. mysql> create table boolean_test (var1 boolean, var2 tinyint); Query OK, 0 rows affected (0. MySQL supports all standard SQL integer types INTEGER or INT and SMALLINT.

#Question# What is sql and mysql?

#Answer#

Nirav Bhat answered


Difference between MySQL and MS SQL Server. KEY DIFFERENCE: · SQL is a language which is used to operate your database whereas MySQL was one of the first open-source database available in the market. SQL is a standard language that enables the user to design and manage databases. SQL stands for Structured Query Language. SQL is a type of language that can be used to utilize your database.

#Question# What is nvarchar in mysql?

#Answer#

Avni Agate answered


In MySQL 5, NVARCHAR (shorthand for National Varchar) is supported and uses utf8 as the predefined character set. The MySQL converts NVARCHAR() to VARCHAR(). According to this MySQL document the LONGTEXT datatype in MySQL is 4 Gigabytes. VARCHAR(10) CHARACTER SET utf8 NATIONAL VARCHAR(10) NVARCHAR( 10) NCHAR VARCHAR(10) NATIONAL CHARACTER VARYING(10) NATIONAL.

#Question# What is mysql?

#Answer#

Sneha Bail answered


MySQL is an open-source relational database management system. MySQL is a database management system. MySQL Database Service is a fully managed database service to deploy cloud- native applications using the world's most popular open source database. MySQL is an open-source relational database management system (RDBMS). MySQL is a database management system that allows you to manage relational databases. What is MySQL? MySQL is a freely available open source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL).

#Question# What is gtid in mysql?

#Answer#

Mirai Gade answered


A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin (source). A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin (the source). This section describes a process for configuring and starting GTID-based replication in MySQL 5. A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin. We've all had to work around these limitations while dreaming about a global transaction identifier. Step-by-step MySQL GTID Replication Setup.

#Question# What is pdo in mysql?

#Answer#

Navya Naik answered


PDO (PHP Data Objects) is a general database abstraction layer with support for MySQL among many other databases. Introduction ¶ PDO_MYSQL is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to MySQL databases. What is the difference between MySQL, MySQLi and PDO? · MySQL: This was the main extension that was designed to help PHP applications. PDO will work on 12 different database systems, whereas MySQLi will only work with MySQL databases. $dbname = "myDBPDO"; try { $conn = new PDO("mysql:host=$servername; dbname=$dbname", $username, $password); // set the PDO error mode to exception. If you are familiar with the native PHP MySQL driver, you will find migration to the procedural MySQLi interface much easier.

#Question# What is myisam in mysql?

#Answer#

Pavati Master answered


MyISAM is a storage engine employed by MySQL database that was used by default prior to MySQL version 5. InnoDB and MYISAM , are storage engines for MySQL. As you all know, the default storage engine chosen by MySQL database is MyISAM. These are MyISAM, which is the default MySQL storage engine, or InnoDB, which is an alternative engine built-in to MySQL intended for.

#Question# What is fsync in mysql?

#Answer#

Jay Bath answered


FSYNC: Data and log files are opened with no options, and the fsyncsystem call is used when the engine requires flushing the data and log files. Actually, the explanation is added in the documentation you linked in the paragraph following O_DIRECT option's description (highlighting is. Increase buffer pool size · Adjust the flush method · Configure an fsync threshold · Use a noop or deadline I/O scheduler with native AIO on Linux · Use direct I/O on. The server with the issue was a VM running with a single CPU socket (multiple cores), so we knew it wasn't NUMA. Posted in: MySQL, Open Source, Technical Track.

#Question# What is btree in mysql?

#Answer#

Vivaan Banerjee answered


The B-Tree is the basic index structure for most MySQL storage engines. This is the default index for most storage engines in MySql. A Binary Tree (not B-tree) has a branching factor of 2, it means, it has 2 child nodes. The database stores the value indexed as a B-Tree key, and the record pointer as a B-Tree value. MySQL Indexing for Performance by Pinal Dave https://app.

#Question# What is ifnull in mysql?

#Answer#

Viti Mand answered


MySQL IFNULL function is one of the MySQL control flow functions that accepts two arguments and returns the first argument if it is not NULL. IFNULL print the null if the table is an empty or other condition. The MySQL IFNULL function allows you to return an alternate value if an expression is NULL.

#Question# What is ibtmp1 file in mysql?

#Answer#

Mohammad Badal answered


If a value was not specified for this option explicitly, a temporary tablespace data file named ibtmp1 is created in innodb_data_home_dir , which defaults to the MySQL data directory if unspecified. If you're running MySQL 5. ibtmp1 is a temporary working file for MySQL. So we had to add into MySQL config file line shown below to reasonably limit size of temp tablespace and of course RESTART MySQL:. Location of the ibtmp1 file.

#Question# What is frm and ibd files in mysql?

#Answer#

Shanaya Sawhney answered


The data dictionary is a duplicate system that is used for recording table structure and matching table id with the physical. Then, import that mysqldump into your new mysql instance. Let's get the data back! (Its already there we just need to recreate table space).

#Question# How to open mwb file without mysql?

#Answer#

Chandrakiran Bora answered


When all else fails, a universal file viewer is the best way to open a MWB file. Programs like File Magic (Download) can open many different types of files, depending on the format. Although, some files may not be compatible with these programs. If your MWB file isn't compatible, it will only open in binary format.

#Question# Uninstall mysql?

#Answer#

Devapriya Rattan answered


Removing MySQL Workbench After Installation from MySQL Installer · From the MySQL Installer dashboard, click Remove to open the Select Products to Remove .

#Question# Download mysql?

#Answer#

Suryaprakash Sarin answered


Hear this out loudPauseTo download MySQL installer, go to the following link http://dev.mysql.com/downloads/installer/. There are two installer files: If you are connecting to the internet while installing MySQL, you can choose the online installation version mysql-installer-web-community-.exe .

#Question# What is ndb cluster in mysql?

#Answer#

Kahaan Munshi answered


NDB Cluster is the distributed database system underlying MySQL Cluster. MySQL NDB Cluster is a high-availability, high-redundancy version of MySQL adapted for the distributed computing environment. NDB Cluster integrates the standard MySQL server with an in-memory clustered storage engine called NDB (which stands for “Network DataBase”). The MySQL NDB engine dates back to the 1990s when it was first developed as the Network DataBase (NDB) by Mikael Ronström (who is still a. NDBCLUSTER (also known as NDB ) is an in-memory storage engine. A MySQL Cluster is based on the shared-nothing clustering and database sharding architecture.

#Question# How to fetch data faster from mysql?

#Answer#

Ela Zacharia answered


Let's have a look at the most important and useful tips to improve MySQL Query for speed and performance.
  • Optimize Your Database. .
  • Optimize Joins. .
  • Index All Columns Used in 'where', 'order by', and 'group by' Clauses. .
  • Use Full-Text Searches. .
  • MySQL Query Caching.

#Question# What is ibdata1 in mysql?

#Answer#

Zuber Mahal answered


MySQL system tablespace is ibdata1, which is located under /var/lib/mysql. The file ibdata1 is the system tablespace for the InnoDB infrastructure. By default, a single system tablespace data file, named ibdata1 , is created in the data directory. That ibdata1 isn't shrinking is a particularly annoying feature of MySQL. Keep in mind the busiest file in the InnoDB infrastructure is /var/lib/mysql/ibdata1.

#Question# What is innodb in mysql?

#Answer#

Mirai Gade answered


InnoDB is a general-purpose storage engine that balances high reliability and high performance. ibd tablespace file in a database directory under the MySQL data directory, by default. InnoDB is a storage engine for the database management system MySQL and MariaDB. InnoDB and MYISAM , are storage engines for MySQL. InnoDB is mostly used general-purpose storage engine and as of MySQL 5.