February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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The MERGE storage engine
The MERGE storage engine, known also as the MRG_MyISAM engine, is collection of similar tables that can be used as one table instead. Here, "similar" means that all the tables have similar column data types and indexing information. It is not possible to merge tables with the columns listed in a different order or to have the same data types in respective columns or have indexing in a different order.
The following is the list of differences in tables that will not restrict a merge:
- Names of respective columns and indexes can be different.
- Comments in between tables, columns, and indexes can be different.
- AVG_ROW_LENGTH, MAX_ROWS , or PACK_KEYS table options can be different.
When a MERGE table is created, MySQL ...
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