[exercise 7] [Database Principle]

One 、 Single topic selection

1． stay SQL Server What is not an object in is （）.
A） user
B） data
C） surface
D） data type
answer ：B

2． Variable declared ：DECLARE @i int,@c char(4), For now @i assignment 10, by @c assignment ’abcd’, The correct sentence is （）.
A）SET @i=10, @c=‘abcd’
B）SET @i=10, SET @c=‘abcd’
C）SELECT @i=10, @c=‘abcd’
D）SELECT @i=10, SELECT @c=‘abcd’
answer ：C

3． stay SQL Server Server , A stored procedure is a set of predefined and （） Of Transact-SQL sentence .
A） preservation
B） compile
C） explain
D） To write
answer ：B

4． When the 【 】 The positions are break,continue or return when , The output value is （）.

DECLARE @n int
SET @n=3
WHILE @n>0
  BEGIN
    SET @n=@n-1
    IF @n=1 【 】
  END
PRINT @n

A）1,0, No output
B）1,1,_
C）0,0,0
D）0,1,2
answer ：A

Two 、 Completion

1．Transact-SQL Can be used in ____ and ____ Two variables .
answer ： local variable 、 Global variables

2． stay Transact-SQL Two types of annotators can be used in ： Single-line comments ____ And multiline comments ____.
answer ：- - , / * …… * /

3． The command used to declare one or more local variables is ____.
answer ：DECLARE

4． Whether stored procedures or triggers , All are ____ Statement and ____ Collection of statements .
answer ：SQL, Process control

5、 stay SQL Server There is ____ recovery 、____ Recovery and large volume log recovery are three database recovery modes .
answer ： Simple , Completely