Examine the structure of the EMPLOYEES table:Column name Data type RemarksEMPLOYEE_ID NUMBER NOT NULL, Primary KeyLAST_NAME VARCNAR2(30)FIRST_NAME VARCNAR2(30)JOB_ID NUMBERSAL NUMBERMGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBERYou need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task? ()
A. CREATE INDEX NAME _IDX (first_name, last_name);
B. CREATE INDEX NAME _IDX (first_name, AND last_name)
C. CREATE INDEX NAME_IDX ON (First_name, last_name);
D. CREATE INDEX NAME_IDX ON employees (First_name, AND last_name);
E. CREATE INDEX NAME_IDX ON employees (First_name, last_name);
F. CREATE INDEX NAME_IDX FOR employees (First_name, last_name);
第1题:
第2题:
如果table_name表中有索引index_name,删除此索引的语句错误的是()。
A.DROP INDEX index_name ON talbe_name
B.ALTER TABLE table_name DROP INDEX index_name
C.DROP INDEX table_name.index_name
D.ALTER TABLE table_name DROP CONSTRAINT index_name
第3题:
Python 如何定义一个函数()
A.class <name>(<type> arg 1,< type> arg2, … <type> argN)
B.function <name>(arg 1,arg 2, … argN)
C.def <name>(arg 1,arg 2, … argN)
D.def <name>(<type> arg 1,< type> arg2, … <type> argN)
第4题:
第5题:
下列定义函数的方法,在Python中正确的是()。
A.class<name>(<type> arg1,<type> arg2,…<type>argN)
B.function <name>(arg1,arg2,…argN)
C.def <name>(arg1,arg2,…argN)
D.def <name>(<type> arg1,<type> arg2,…<type>argN)
第6题:
2、下列定义函数的方法,在Python中正确的是()。
A.class<name>(<type> arg1,<type> arg2,…<type>argN)
B.function <name>(arg1,arg2,…argN)
C.def <name>(arg1,arg2,…argN)
D.def <name>(<type> arg1,<type> arg2,…<type>argN)