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单选题
在PL/SQL中定义一个可以存放雇员表(EMP)的员工名称(ENAME)的PL/SQL表类型,应该()
A
type array arr_type[emp.ename%type] index by binary_integer;
B
type table arr_type[emp.ename%type] index by binary_integer;
C
type arr_type is table of emp.ename%type index by binary_integer;
D
type arr_type is pl_sql table of emp.ename%type index by binary_integer;
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更多 “单选题在PL/SQL中定义一个可以存放雇员表(EMP)的员工名称(ENAME)的PL/SQL表类型,应该()A type array arr_type[emp.ename%type] index by binary_integer;B type table arr_type[emp.ename%type] index by binary_integer;C type arr_type is table of emp.ename%type index by binary_integer;D type arr_type is pl_sql table of emp.ename%type index by binary_integer;” 相关考题
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考题
单选题emp表是雇员信息表,以下哪个变量可以存放emp表中的一条记录()A
v_record emp%type;B
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考题
单选题emp表是雇员信息表,sal字段存放是的雇员的月薪,以下哪个变量可以存放sal类型的值()A
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v_sal %type(emp.sal);E
v_sal (emp.sal)%type;
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单选题假设ClassX是类类型标识符,Type为类型标识符,可以是基本类型或类类型,Type_Value为Type类型的表达式,那么,类型转换函数的形式为()A
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