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https://dev.mysql.com/doc/refman/9.7/en/internal-temporary-tables.html
In some cases, the server creates internal temporary tables while processing statements. The server creates temporary tables under conditions such as these: Evaluation of UNION statements, with some exceptions described later. Evaluation of some ...
https://dev.mysql.com/doc/refman/9.7/en/multiple-tables.html
The pet table keeps track of which pets you have. If you want to record other information about them, such as events in their lives like visits to the vet or when litters are born, you need another table. What should this table look like? It needs ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-online-add-node-example.html
In this section we provide a detailed example illustrating how to add new NDB Cluster data nodes online, starting with an NDB Cluster having 2 data nodes in a single node group and concluding with a cluster having 4 data nodes in 2 node groups.
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-replication-schema.html
ndb_apply_status Table ndb_binlog_index Table ndb_replication Table Replication in NDB Cluster makes use of a number of dedicated tables in the mysql database on each MySQL Server instance acting as an SQL node in both the cluster being replicated ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-indexes.html
Indexes are used to find rows with specific column values quickly. Without an index, MySQL must begin with the first row and then read through the entire table to find the relevant rows. If the table has an index for the columns in question, MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/mysqlslap.html
mysqlslap is a diagnostic program designed to emulate client load for a MySQL server and to report the timing of each stage. Invoke mysqlslap like this: mysqlslap [options] Some options such as --create or --query enable you to specify a string ...
https://dev.mysql.com/doc/refman/9.7/en/other-vendor-data-types.html
To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. These mappings make it easier to import table definitions from other database systems into MySQL. If you create ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-key.html
Partitioning by key is similar to partitioning by hash, except that where hash partitioning employs a user-defined expression, the hashing function for key partitioning is supplied by the MySQL server. NDB Cluster uses MD5() for this purpose; for ...
https://dev.mysql.com/doc/refman/9.7/en/silent-column-changes.html
In some cases, MySQL silently changes column specifications from those given in a CREATE TABLE or ALTER TABLE statement. These might be changes to a data type, to attributes associated with a data type, or to an index specification. All changes are ...
https://dev.mysql.com/doc/refman/9.7/en/srjs-api-data-metadata.html
This includes the names of the columns in the result set. If the result set is not empty, the contents of each row are printed in the order obtained; otherwise, the function gets the number of rows affected by the statement and the value of the last ...