VARCHAR, TEXT, ENUM, and SET data types, you can declare a column with a binary (_bin) collation or the BINARY attribute to cause comparison and sorting to use the underlying character code values rather than a
MySQL has data types for storing dates and times:DATE,TIME,DATETIME,YEAR, andTIMESTAMP. MySQL tries to interpret date and time values in several formats but the date parts must always be given in year/month/day order. MySQL automatically converts a date or time value to a number if the ...
MySQL Data Types (Version 8.0) In MySQL there are three main data types: string, numeric, and date and time. String Data Types Data typeDescription CHAR(size)A FIXED length string (can contain letters, numbers, and special characters). Thesizeparameter specifies the column length in characters...
Row-based replication: attribute promotion and demotion.Row-based replication supports attribute promotion and demotion between smaller data types and larger types. It is also possible to specify whether or not to permit lossy (truncated) or non-lossy conversions of demoted column values, as expla...
Variable-length string types are stored using a length prefix plus data. The length prefix requires from one to four bytes depending on the data type, and the value of the prefix is L (the byte length of the string). For example, storage for a MEDIUMTEXT value requires L bytes to store...
specify a storage length, not stripping bytes when selected, and do not pad unused character space for efficient disk storage. SinceTEXTobjects are not stored in the server’s memory, they require data overhead for retrieval. The following sizes assume the database is using the UTF-8 encoding...
# The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling ...
In prepared statements, some types of subqueries could cause a server exit. (Bug #33100586) Aurora MySQL database engine updates 2022-10-25 (version 2.11.0, compatible with MySQL 5.7.12) This version isn't available for new creations, and has reached the end of standard support. ...
For additional connection-related information, check the Connection_errors_xxx status variables and the host_cache table. Binlog_cache_disk_use The number of transactions that used the temporary binary log cache but that exceeded the value of binlog_cache_size and used a temporary file to store...
The “full” TIMESTAMP format is 14 digits, but TIMESTAMP columns may be created with shorter display sizes: Column type Display format TIMESTAMP(14) YYYYMMDDHHMMSS TIMESTAMP(12) YYMMDDHHMMSS TIMESTAMP(10) YYMMDDHHMM TIMESTAMP(8) YYYYMMDD TIMESTAMP(6) YYMMDD TIMESTAMP(4) YYMM TIMESTAMP(2...