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https://dev.mysql.com/partitioning-management-hash-key.html
Tables which are partitioned by hash or by key are very similar to one another with regard to making changes in a partitioning setup, and both differ in a number of ways from tables which have been partitioned by range or list. For that reason, ...
https://dev.mysql.com/glossary.html
off-page column A column containing variable-length data (such as BLOB and VARCHAR) that is too long to fit on a B-tree page. overflow page Separately allocated disk pages that hold variable-length columns (such as BLOB and VARCHAR) that are too ...
https://dev.mysql.com/if.html
[ELSE statement_list] END IF The IF statement for stored programs implements a basic conditional construct. Note There is also an IF() function, which differs from the IF statement described here. The IF statement can have THEN, ELSE, and ELSEIF ...
https://dev.mysql.com/blob.html
Similarly, you can regard a TEXT column as a VARCHAR column. BLOB and TEXT differ from VARBINARY and VARCHAR in the following ways: For indexes on BLOB and TEXT columns, you must specify an index prefix length. MySQL Connector/ODBC defines BLOB ...
https://dev.mysql.com/replication-features-differing-tables.html
If only ALL_NON_LOSSY is set, but not ALL_LOSSY, then attempting a conversion that would result in the loss of data (such as INT to TINYINT, or CHAR(25) to VARCHAR(20)) causes the slave to stop with an error. Between any of the string types CHAR, ...
https://dev.mysql.com/charset-national.html
For example, these data type declarations are equivalent: CHAR(10) CHARACTER SET utf8 NATIONAL CHARACTER(10) NCHAR(10) As are these: VARCHAR(10) CHARACTER SET utf8 NATIONAL VARCHAR(10) NVARCHAR(10) NCHAR VARCHAR(10) NATIONAL CHARACTER VARYING(10) ...
https://dev.mysql.com/federated-usagenotes.html
For example, creating a FEDERATED table with an index prefix on VARCHAR, TEXT or BLOB columns will fail. The following items indicate features that the FEDERATED storage engine does and does not support: The remote server must be a MySQL server. The ...
https://dev.mysql.com/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/mysql-indexes.html
In this context, VARCHAR and CHAR are considered the same if they are declared as the same size. For example, VARCHAR(10) and CHAR(10) are the same size, but VARCHAR(10) and CHAR(15) are not. Indexes are used to find rows with specific column ...
https://dev.mysql.com/getting-information.html
What if you forget the name of a database or table, or what the structure of a given table is (for example, what its columns are called)? MySQL addresses this problem through several statements that provide information about the databases and ...
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