sql创建表索引 create index()语句

create nonclustered index ix_test_tname --创建一个非聚集索引
on test(tname)  --为test表的tname字段创建索引
with fillfactor = 30 --填充因子为30%
go
select * from test(index = ix_test_tname) where tname = 'a'

create [unioun|fulltext|spatial] index indexname[using indextype] on
tablename( tablenamecol)
index_col_name:
col_name[ (length)][asc |desc]

create index personindex
on person (lastname)

create index personindex
on person (lastname desc)

create index personindex
on person (lastname, firstname)