Shulou(Shulou.com)06/01 Report--

1. What is the meaning of the abbreviation "SQL"?

Stuctured query language structured query language

What are the six main categories of the 2.SQL command?

Transaction control commands commit data definition language create table data operation language update data query language select data management commands (audit analysis start audit) data control language grant

What are 3.4 transaction control commands?

Commit rollback set transaction save point

4. For database access, what is the main difference between the client / server model and Web technology?

Web technology is easier to use and more convenient and tedious work has been undertaken in the programming design stage.

5. If a field is defined as NULL, does this mean that something must be entered in the field?

It can not be empty.

1. Define operation query operation control operation

2.employee number | | item number | | serial number

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.