A
B
C
D
第1题:
A、col-xs-*
B、col-sm-*
C、col-lg-*
D、col-md-*
第2题:
The following statements:CREATE TABLE t1 (col1 INT NOT NULL, PRIMARY KEY(col1)); CREATE TABLE t2 (col1 INT NOT NULL, col2 CHAR(1) NOT NULL, PRIMARY KEY (col1, col2), FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE CASCADE ON UPDATE RESTRICT); CREATE TABLE t3 (col1 INT NOT NULL, col2 INT NOT NULL, PRIMARY KEY (col1, col2),FOREIGN KEY (col1) REFERENCES t1 (col1) ON DELETE NO ACTION ON UPDATE RESTRICT);INSERT INTO t1 VALUES (1), (2); INSERT INTO t2 VALUES (1, ‘a‘), (1, ‘b‘), (2,‘c‘); INSERT INTO t3 VALUES (1, 100), (2, 200), (2,300);How many rows will be deleted by the following DELETE statement? DELETE FROM t1 WHERE col1= 1;()
A.4
B.3
C.1
D.0
第3题:
关于屏幕的尺寸标准,说法错误的是()
第4题:
If a unique constraint is defined on column COL1 of table TAB1, what are the characteristics of COL1?()
第5题:
对于表A(col1 int,col2 char(1)),表B(col1 int,col2char(1)),为确保表A的数据全部被保留,下面正确的联接方式是()
第6题:
关于栅格系统,哪些是正确的()
第7题:
对于表A(col1 int,col2 char(1))更新col1=1的数据col2值为N,下面语句正确的是()
第8题:
存在两个结构相同的数据库表T1(col1,col2,col3)、T2(col1,col2,col3),写出一SQL语句将所有T1数据导入到T2表()
第9题:
Bootstrap响应式栅格布局系统中,以下表示列偏移的是()。
第10题:
select col1,col2,col3 from T1 into T2(col1,col2,col3)
insert T1 (col1,col,col3) into T2(col1,col2,col3)
insert into T2 (col1,col2,col3) as select col1,col2,col3 from T1
insert into T2(col1,col2,col3) select col1,col2,col3 from T1;
第11题:
The operation col1.retainAll(col2) will not modify the col1 object.
The operation col1.removeAll(col2) will not modify the col2 object.
The operation col1.addAll(col2) will return a new collection object, containing elements from both col1 and col2.
The operation col1.containsAll(Col2) will not modify the col1 object.
第12题:
4
3
1
0
第13题:
A.Theoperationcol1.retainAll(col2)willnotmodifythecol1object.
B.Theoperationcol1.removeAll(col2)willnotmodifythecol2object.
C.Theoperationcol1.addAll(col2)willreturnanewcollectionobject,containingelementsfrombothcol1 andcol2.
D.Theoperationcol1.containsAll(Col2)willnotmodifythecol1object.
第14题:
第15题:
A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?()
第16题:
Alport综合征的基因突变不包括()
第17题:
能在1024的windows机器上显示8列而在肾6手机上显示12列的是()
第18题:
关于嵌套列的用法,错误的是()
第19题:
Alport综合征的基因突变不包括()
第20题:
Given two collection objects referenced by col1 and col2,which of these statements are true?()
第21题:
A inner join B
A left join B
A right join B
Across join B
第22题:
update table A setcol2=’N’ where col1=1
modify table A setcol2=N where col1=1
update A set col2=’N’ where col1=1
modify A set col2=N where col1=1
第23题:
Any row inserted or updated through view V1 must meet the condition that col4 > 1000.
From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.
At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.
Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.