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If a table contains big variable-length columns (BLOB or TEXT) it cannot use the FIXED format. DYNAMIC: Variable-length columns do not have a fixed length size. This format is a bit slower to read but saves some space on disk. COMPRESSED: Compressed tables can be created with a dedicated tool while MySQL is not running, and they are read-only.
Note (7): When using a page size of 32 KB, and when BLOB/CLOB data is stored in the database file. Note (8): Java array size limit of 2,147,483,648 (2 31) objects per array applies. This limit applies to number of characters in names, rows per table, columns per table, and characters per CHAR/VARCHAR.
mod_authnz_mysql: Version 2.2: This module provides both authentication and authorization for the Apache 2.2 webserver like mod-authnz-ldap . It uses a MySQL database to retrieve user and group informations. mod_backhand: Version 1.3: Third-party module: Yair Amir, Theo Schlossnagle: Seamless redirection of HTTP requests from one web server to ...
For example, a table of 128 rows with a Boolean column requires 128 bytes a row-oriented format (one byte per Boolean) but 128 bits (16 bytes) in a column-oriented format (via a bitmap). Another example is the use of run-length encoding to encode a column.
For example, nested tables (tables inside tables) should be separated into distinct tables when possible. Here is a more advanced example, showing some more options available for making up tables. Users can play with these settings in their own table to see what effect they have.
In a database, a table is a collection of related data organized in table format; consisting of columns and rows. In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]
A derived table is a subquery in a FROM clause. Essentially, the derived table is a subquery that can be selected from or joined to. Derived table functionality allows the user to reference the subquery as a table. The derived table also is referred to as an inline view or a select in from list.
With this option, Format writes bootstrap code to the first sector of the volume (and possibly elsewhere as well). Format always writes a BIOS Parameter Block to the first sector, with or without the /S option. Another option (/Q) allows for what Microsoft calls "Quick Format". With this option the command will not perform steps 2 and 3 above.