MySQL 創建索引(Create Index)的方法和語法結構及例子

mysql 創建索引(Create Index)的方法和語法結構及例子

CREATE INDEX Syntax

CREATE [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name
[index_type]
ON tbl_name (index_col_name,…)
[index_type]

index_col_name:
col_name [(length)] [ASC | DESC]

index_type:
USING {BTREE | HASH | RTREE}
代碼如下:
— 創建無索引的表格
create table testNoPK (
id int not null,
name varchar(10)
);
— 創建普通索引
create index IDX_testNoPK_Name on testNoPK (name);