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https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-collections-add.html
In this example we are using the world_x schema imported previously, and the countryinfo collection. As this is multi-line content, press Enter twice to insert the document. A MySQL server at an earlier 8.0 release or at 5.7 does not set an _id ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-javascript-documents-in-tables.html
Examples in this section use the city table in the world_x schema. mysql-js> db.city.insert().values( None, "San Francisco", "USA", "California", '{"Population":830000}') Select a Record You can issue a query with a search condition that evaluates ... In MySQL, a table may contain traditional relational data, JSON values, or ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-add.html
In this example we are using the world_x schema imported previously, and the countryinfo collection. As this is multi-line content, press Enter twice to insert the document. A MySQL server at an earlier 8.0 release or at 5.7 does not set an _id ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-shell-tutorial-python-documents-in-tables.html
Examples in this section use the city table in the world_x schema. mysql-py> db.city.insert().values( None, "San Francisco", "USA", "California", '{"Population":830000}') Select a Record You can issue a query with a search condition that evaluates ... In MySQL, a table may contain traditional relational data, JSON values, or ...
https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html
This occurs due to heuristic pruning during greedy search, which can be avoided by setting optimizer_prune_level=0. Changes to this variable affect execution of all subsequent queries; to affect one query differently from another, it is necessary to ... One means of control over optimizer strategies is to set the optimizer_switch system variable (see Section 10.9.2, “Switchable ...
https://dev.mysql.com/doc/refman/8.0/en/outer-join-optimization.html
MySQL implements an A LEFT JOIN B join_specification as follows: Table B is set to depend on table A and all tables on which A depends. Table A is set to depend on all tables (except B) that are used in the LEFT JOIN condition. The LEFT JOIN ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-info.html
row *************************** id: 1 select_type: SIMPLE table: trb1 partitions: p0,p1,p2,p3 type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 10 Extra: Using filesort In this case, all four partitions are searched. This ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-overview.html
This section provides a conceptual overview of partitioning in MySQL 8.0. Partitioning takes this notion a step further, by enabling you to distribute portions of individual tables across a file system according to rules which you can set largely ...For information on partitioning restrictions and feature limitations, see Section 26.6, “Restrictions and Limitations on ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-tables.html
This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for ...
https://dev.mysql.com/doc/refman/8.0/en/perl-support.html
You can obtain the necessary modules from http://search.cpan.org for Unix, or by using the ActiveState ppm program on Windows. The Perl DBI module provides a generic interface for database access. You can write a DBI script that works with many ...