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The order of operands is significant in EXCEPT (MINUS) queries but is irrelevant in UNION queries?

Below are some rows of the PROVIDERS table for a factory: PCODE 10192 98411 0489035 NAME Hans, Inc. Tools and More Motors Inc. PHONE 231 - 3092 231-1029 993 - 1821 All providers from the factory zone of the city start with 231. You want to get the providers that are in the factory zone of the city. Which of the following is more appropriate? O a. O b. SELECT * FROM PROVIDERS WHERE PHONE LIKE '% 231' O C. O d. SELECT * FROM PROVIDERS WHERE PHONE LIKE $231%' SELECT * FROM PROVIDERS WHERE PHONE LIKE 231 SELECT * FROM PROVIDERS WHERE PHONE LIKE '%231%'

1.6   Using SQL Server (Not Oracle)

First normal form says: a. No nonkey columns depend on another nonkey column b. Every column that's not part of the primary key is fully dependent on the primary key. c. Eliminate repeated fields. d. None of the above

4. Update the name of the student to "John Doe" where its id is 10. Enter your answer 5. Modify the "student" table by adding "address" column/field as string and allows null.

I need help with creating the SQL statement for the instructions below. Create the following 2 tables with columns and constraints Table Lab4program_xxxx has 3 columns: code is varchar(5) and the primar key, name is varchar(20), tel varchar(20). Table Lab4course_xxxx has 3 columns: cid is int, and the primary key, name is varchar(20), credits is int, mycode is a foreign key reference to your Lab4program table. Table Lab4program_xxxx has 3 columns: code is varchar(5) and the primar key, name is varchar(20), tel varchar(20). Table Lab4course_xxxx has 3 columns: cid is int, and the primary key, name is varchar(20), credits is int, mycode is a foreign key reference to your Lab4program table.

I need the answer as soon as possible

so which answer choices are correct ?

I need the references for the answers