数据表的创建

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Table 数据表创建

数据表创建

#语法规则1CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name(create_definition, ...)[table_options][partion_options]#语法规则2CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name[(create_definition, ...)][table_options][partion_options]select_statement#语法规则3CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name{LIKE old_tbl_name | (LIKE old_tbl_name)}#create_definition 语法 create_definition:    col_name column_definition    | [CONSTRAINT [symbol]] PRIMARY KEY [index_type] (index_col_name, ...)        [index_option] ....    | {INDEX|KEY} {index_name} [index_type] (index_col_name)        [index_option] ...    | [CONSTRAINT [symbol]] UNIQUE [INDEX|KEY]        [index_name] [index_type] (index_col_name)        [index_option] ...    | [FULLTEXT|SPATIAL] [INDEX|KEY] [index_name] (index_col_name, ....)      [index_option] ...    | [CONSTRAINT [symbol]] FOREIGN KEY       [index_name] (index_col_name, ...) reference_definition    | CHECK (EXPR)#column_definition 语法column_definition:    data_type [NOT NULL | NULL] [DEFAULT default_value]      [AUTO_INCREMENT] [UNIQUE [KEY] | [PRIMARY] KEY]      [COMMENT 'string']      [COLUMN_FORMAT {FIXED|DYNAMIC|DEFAULT}]      [STORAGE {DISK|MEMMORY|DEFAULT}]      [reference_definition]#data_type 语法 data_type:    BIT[(length)]  | TINYINT[(length)] [UNSIGNED] [ZEROFILL]  | SMALLINT[(length)] [UNSIGNED] [ZEROFILL]  | MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]  | INT[(length)] [UNSIGNED] [ZEROFILL]  | INTEGER[(length)] [UNSIGNED] [ZEROFILL]  | BIGINT[(length)] [UNSIGNED] [ZEROFILL]  | REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]  | DOUBLE[(length,decimals)] [UNSIGNED] [ZEROFILL]  | FLOAT[(length,decimals)] [UNSIGNED] [ZEROFILL]  | DECIMAL[(length[,decimals])] [UNSIGNED] [ZEROFILL]  | NUMERIC[(length[,decimals])] [UNSIGNED] [ZEROFILL]  | DATE  | TIME  | TIMESTAMP  | DATETIME  | YEAR  | CHAR[(length)] [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | VARCHAR(length) [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | BINARY[(length)]  | VARBINARY(length)  | TINYBLOB  | BLOB  | MEDIUMBLOB  | LONGBLOB  | TINYTEXT [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | TEXT [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | MEDIUMTEXT [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | LONGTEXT [BINARY]      [CHARACTER SET charset_name] [COLLATE collation_name]  | ENUM(value1,value2,value3,...)      [CHARACTER SET charset_name] [COLLATE collation_name]  | SET(value1,value2,value3,...)      [CHARACTER SET charset_name] [COLLATE collation_name]  | spatial_type#index_col_name 语法 col_name:    col_name [(length)] [ASC|DESC]  #INDEX (name(3) ASC, email) #index_type 语法 index_type:    USING {BTREE | HASH} # INDEX index_username_length_3  BTREE (username(3) ASC)#index_option 语法 index_option:    KEY_BLOCK_SIZE [=] value   | index_type   | WITH PARSER parser_name  | COMMENT 'string'#reference_definition 语法reference_definition:    REFERENCES tbl_name (index_col_name, ...)    [MATCH FULL | MATCH PARTIAL | MATCH SIMPLE]    [ON DELETE reference_option]    [ON UPDATE reference_option]# reference_option 语法reference_option:    RESTRICT | CASCADE | SET NULL | NO ACTION#table_options 语法：table_options:    table_option [[,] table_option] ...#table_option 语法：table_option:    ENGINE [=] engine_name  | AUTO_INCREMENT [=] value  | AVG_ROW_LENGTH [=] value #指定行的平均长度  | MAX_ROWS [=] value # 和AVG_ROW_LENGTH 配合计算标的最大容量  | MIN_ROWS [=] value  | [DEFAULT] CHARACTER SET [=] charset_name  | CHECKSUM [=] {0|1}  | [DEFAULT] COLLATE [=] collation_name  | DATA DIRECTORY [=] 'absolute path to directory'  | DELAY_KEY_WRITE [=] {0 | 1}  | INDEX DIRECTORY [=] 'absolute path to directory'  | INSERT_METHOD [=] { NO | FIRST | LAST }  | KEY_BLOCK_SIZE [=] value  | PACK_KEYS [=] {0 | 1 | DEFAULT}  | PASSWORD [=] 'string'  | ROW_FORMAT [=] {DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT}  | TABLESPACE tablespace_name [STORAGE {DISK|MEMORY|DEFAULT}]  | UNION [=] (tbl_name[,tbl_name]...)#partition_options 语法partition_option:    PARTITION BY        { [LINEAR] HASH (expr)        | [LINEAR] KEY [ALGORITHM = {1|2}] (column_list)        | RANGE {(expr) | COLUMNS(column_list)}        | LIST {(expr) | COLUMNS(column_list)}}        [PARTITIONS num]        [SUBPARTITION BY          { [LINEAR] HASH(expr)            | [LINEAR] KEY [ALGORITHM = {1|2}] (column_list)          }          [SUBPARTITION num]        ]        [(partition_definition [, partition_definition] ...)]#partition_definition 语法partition_definition:    PARTITION partition_name        [VALUES             {LESS THAN {(expr | value_list) | MAXVALUE}             |             IN (value_list)}]        [[STORAGE] ENGINE [=] engine_name]        [COMMENT [=] 'comment_text' ]        [DATA DIRECTORY [=] 'data_dir']        [INDEX DIRECTORY [=] 'index_dir']        [MAX_ROWS [=] max_number_of_rows]        [MIN_ROWS [=] min_number_of_rows]        [TABLESPACE [=] tablespace_name]        [NODEGROUP [=] node_group_id]        [(subpartition_definition [, subpartition_definition] ...)]#subpartition_definition 语法：subpartition_definition:    SUBPARTITION logical_name        [[STORAGE] ENGINE [=] engine_name]        [COMMENT [=] 'comment_text' ]        [DATA DIRECTORY [=] 'data_dir']        [INDEX DIRECTORY [=] 'index_dir']        [MAX_ROWS [=] max_number_of_rows]        [MIN_ROWS [=] min_number_of_rows]        [TABLESPACE [=] tablespace_name]        [NODEGROUP [=] node_group_id]select_statement:    [IGNORE | REPLACE] [AS] SELECT ...   (Some valid select statement)             1
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注意：创建表之前首先得具有CREATE权限，如果没有权限，表已经存在，没有声明引用的数据库将引发错误
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