Found 4219 Articles for MySQLi

MySQL server supports extensions which may not be found in other SQL databases. This means, if these extensions of MySQL are used, the code can’t be ported to other SQL servers. But sometimes, it can be ported.Let us understand the MySQL extensions to standard SQL −Enclosing StringsThe strings can be enclosed in “ (double quotes) or ‘ (single quote) by default. If the ‘ANSI_QUOTES’ SQL mode is on, the strings have to be enclosed using ‘, and if “ (double quotes) is used, the server interprets this as identifiers.Escape Character\ is the escape character for strings.Accessing TableMySQL doesn’t support tablespaces, ... Read More

The standards compliance tells how MySQL is related to the ANSI/ISO SQL standards. There are many versions of the SQL standard, and the phrase ‘SQL standard’ is used to refer to the current version of SQL standard at any point in time.Following are the MySQL Standards Compliance −MySQL server was originally designed to work with medium-sized databases (10 to 100 million rows or 100 MB per table) on small systems. But currently, it has been upgraded to work with terabyte-sized databases.MySQL supports ODBC levels ranging from 0 to 3.5.1.MySQL also supports high-availability database clustering, which can be achieved with the ... Read More

What is a bug?A bug is something that results in the program stalling or halting abruptly. This results in anomalies and causes complications, resulting in the task not getting complete. MySQL helps resolve these bugs, once they are reported.Some bugs have fixes since they would have been previously reported, and fixes would have been provided.Pre-requisitesBefore posting a bug report, it is important to verify that the bug hasn’t been reported already. For this purpose, look for the problem in the MySQL manual at https://dev.mysql.com/doc/. The manual is always updated with solutions to newly found issues.If there is a parsing error ... Read More

DocumentationThere are many sources for the documentation of MySQL, but the primary website is https://dev.mysql.com/doc/.The developers of MySQL have provided information about the new and upcoming features in the server in the website: MySQL Server BlogCommunity ResourceCommunity resource also play an important role. The forum is https://forums.mysql.com. There are many forums, and they have been grouped into many categories. Some of them have been listed below:MigrationMySQL UsageMySQL ConnectorsProgramming LanguagesTools3rd-Party ApplicationsStorage EnginesMySQL TechnologySQL StandardsBusinessTechnical SupportOracle also offers technical support as MySQL enterprise. Organizations that use MySQL DBMS for important, and business-critical production applications get a subscription that includes the following:MySQL Enterprise ... Read More

MySQL Enterprise EditionMySQL Enterprise Edition comes with advanced features, management tools, and technical support that helps users achieve the highest levels of MySQL scalability, security, reliability, and uptime. It reduces the risk, complication, and cost associated with development, deployment, and management of business-critical MySQL applications.MySQL Database Service is a fully managed database service that helps deploy cloud-native applications using the MySQL, which is considered as the world’s most popular open source database. It is completely developed, managed and supported by the MySQL Team.MySQL Standard EditionMySQL standard edition ensures that user delivers high-performance and provides scalability on OLTP applications (Online Transaction ... Read More

Some of the options and variables that have been removed in MySQL 8.0 have been listed below:innodb_available_undo_logs: It refers to the total number of InnoDB rollback segments. It is different from innodb_rollback_segments, which displays the number of active rollback segments. It was removed in MySQL 8.0.2.Qcache_free_blocks: It refers to the number of free memory blocks in query cache. It was removed in MySQL 8.0.3.Qcache_free_memory: It refers to the amount of free memory for the query cache. It was removed in MySQL 8.0.3.bootstrap: It is used by MySQL installation scripts. It was removed in MySQL 8.0.0.date_format: It is the DATE format (unused). It ... Read More

Some of the options and variables that have been deprecated in MySQL 8.0 have been listed below:Compression: It tells whether the client connection uses compression in client/server protocol or not. It was deprecated since MySQL 8.0.18.expire_logs_days: It purges the binary logs after specific number of days. It was deprecated since MySQL 8.0.3.log_syslog: It determines whether to write error log to syslog. It was deprecated since MySQL 8.0.2.master-info-file: It helps determine the location and name of file that remembers the source and where the I/O replication thread is, in source's binary log. It was deprecated since MySQL 8.0.18.master_info_repository: It determines whether ... Read More

Some of the options and variables newly introduced in MySQL 8.0 have been listed below:Com_clone: It refers to the number of CLONE statements. It was added in MySQL 8.0.2.Com_create_role: It refers to the number of CREATE ROLE statements that are used. It was added in MySQL 8.0.0.Com_drop_role: It refers to the number of DROP ROLE statements that were used. It was added in MySQL 8.0.0.Com_restart: It refers to the number of RESTART statements that were used. It was added in MySQL 8.0.4.Firewall_access_denied: It refers to the number of statements that were rejected by MySQL Enterprise Firewall. It was added in ... Read More

Some of the features have become obsolete and have been removed from MySQL 8.0. When alternatives to these removed items are shown, they need to be used to avoid further complications.The ‘innodb_locks_unsafe_for_binlog’ system variable has been removed.The ‘READ COMMITTED’ isolation level can be used since it behaves in a similar way.After upgrading the system to MySQL version 8.0.3 or later, scripts that reference previous InnoDB INFORMATION_SCHEMA view names have to be upgraded.Some of the account management attributes have been removed. A few have been listed below:Instead of using ‘GRANT’ to create users, use ‘CREATE USER’.The query cache has been removed.The deprecated ... Read More

Some of the features that have been deprecated may be removed in the upcoming versions of MySQL. If applications use the features that have been deprecated in that specific version, that feature should be revised and alternatives should be used wherever possible.Let us understand in brief, the features that have been deprecated in MySQL 8.0:The ‘utf8mb3’ character set is deprecated, use ‘utf8mb4’ instead.The ‘sha256_password’ password authentication is deprecated, may be removed in future updates. Use ‘caching_sha2_password’ instead.Some implementation changes have been made to ‘validate_password’ plugin, may be removed in future versions. Use this plugin by ensuring that component infrastructure is ... Read More