Use of sqlserver index (create, delete and update)

Create table student

create table student(
    sno int primary key,
    sname varchar(20) not null,
    sex int default 1
)

First, create an index

1. Create a non-clustered index

create index index_student_sno on student(sno)

2. Create a compound index

create index index_student_sno_sname on student(sno,sname)

3. Create a unique non-clustered index

create unique index index_student_sno on student(sno)

Second, delete the index

drop index student.index_student_sno

Third, update the index

1. Rename the index

--更改索引名: index_student_sno改为 index_student_sno1
sp_rename 'student.index_student_sno','index_student_sno1','INDEX'