1. Write a SQL query that writes todays date and time in the following format编写一个SQL查询，用以下格式写今天的日期和时间
2. Write the syntactically correct code to initialize at least three variables of different data types. One of the data types should be a date. Initialize all the variables to appropriate values编写语法正确的代码来初始化至少三个不同数据类型的变量。 其中一种数据类型应该是日期。 将所有变量初始化为适当的值
3. Name the elements of the collection命名集合的元素
DBMS_OUTPUT.PUT_LINE(vl_terminal_list(i).vr_terminal.terminalID);
4. The following code has a number of syntax errors. You are asked to identify the errors and indicate why the syntax is wrong. In your answer, you should reference the code using the line numbers included.以下代码有许多语法错误。 您被要求识别错误并指出语法错误的原因。 在你的回答中，你应该使用包含的行号引用代码。