mysql学习笔记之帮助文档

2024-02-29 08:34:02 469

mysql>helpcontents; Youaskedforhelpabouthelpcategory:"Contents" Formoreinformation,type'help<item>',where<item>isoneofthefollowing categories: AccountManagement Administration CompoundStatements DataDefinition DataManipulation DataTypes Functions FunctionsandModifiersforUsewithGROUPBY GeographicFeatures HelpMetadata LanguageStructure Plugins Procedures StorageEngines TableMaintenance Transactions User-DefinedFunctions Utility

mysql>helpdatatypes; Youaskedforhelpabouthelpcategory:"DataTypes" Formoreinformation,type'help<item>',where<item>isoneofthefollowing topics: AUTO_INCREMENT BIGINT BINARY BIT BLOB BLOBDATATYPE BOOLEAN CHAR CHARBYTE DATE DATETIME DEC DECIMAL DOUBLE DOUBLEPRECISION ENUM FLOAT INT INTEGER LONGBLOB LONGTEXT MEDIUMBLOB MEDIUMINT MEDIUMTEXT SETDATATYPE SMALLINT TEXT TIME TIMESTAMP TINYBLOB TINYINT TINYTEXT VARBINARY VARCHAR YEARDATATYPE

mysql>helpint; Name:'INT' Description: INT[(M)][UNSIGNED][ZEROFILL] Anormal-sizeinteger.Thesignedrangeis-2147483648to2147483647. Theunsignedrangeis0to4294967295. URL:http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html mysql>helptinyint; Name:'TINYINT' Description: TINYINT[(M)][UNSIGNED][ZEROFILL] Averysmallinteger.Thesignedrangeis-128to127.Theunsigned rangeis0to255. URL:http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html

mysql学习笔记之帮助文档

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