本文給大家詳細講述的是mysql的help(幫助)命令的用法,非常細致,有需要的小伙伴可以來參考下
查看系統幫助
help contents
mysql>?help?contents; You?asked?for?help?about?help?category:?"Contents" For?more?information,?type?'help?<item>',?where?<item>?is?one?of?the?following categories: ??Account?Management ??Administration ??Compound?Statements ??Data?Definition ??Data?Manipulation ??Data?Types ??Functions ??Functions?and?Modifiers?for?Use?with?GROUP?BY ??Geographic?Features ??Help?Metadata ??Language?Structure ??Plugins ??Procedures ??Storage?Engines ??Table?Maintenance ??Transactions ??User-Defined?Functions ??Utility</item></item>
幫助文檔的目錄列表
查看mysql
help data types
mysql>?help?data?types; You?asked?for?help?about?help?category:?"Data?Types" For?more?information,?type?'help?<item>',?where?<item>?is?one?of?the?following topics: ??AUTO_INCREMENT ??BIGINT ??BINARY ??BIT ??BLOB ??BLOB?DATA?TYPE ??BOOLEAN ??CHAR ??CHAR?BYTE ??DATE ??DATETIME ??DEC ??DECIMAL ??DOUBLE ??DOUBLE?PRECISION ??ENUM ??FLOAT ??INT ??INTEGER ??LONGBLOB ??LONGTEXT ??MEDIUMBLOB ??MEDIUMINT ??MEDIUMTEXT ??SET?DATA?TYPE ??SMALLINT ??TEXT ??TIME ??timestamp ??TINYBLOB ??TINYINT ??TINYTEXT ??VARBINARY ??VARCHAR ??YEAR?DATA?TYPE</item></item>
查看mysql
mysql>?help?int; Name:?'INT' Description: INT[(M)]?[UNSIGNED]?[ZEROFILL] A?normal-size?integer.?The?signed?range?is?-2147483648?to?2147483647. The?unsigned?range?is?0?to?4294967295. URL:?http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html mysql>?help?tinyint; Name:?'TINYINT' Description: TINYINT[(M)]?[UNSIGNED]?[ZEROFILL] A?very?small?integer.?The?signed?range?is?-128?to?127.?The?unsigned range?is?0?to?255. URL:?http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html
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