Which Of the following can be used instead Of the ALTER DATABASE statement?

What will be the result of the following query? SELECT 'hello hel lo he 0'

Which relational comparison operators can be used to compare row operands as well as scalar operands?

Which is NOT a constraint of the INSERT DELAYED statement?

Which statements regarding the TRUNCATE TABLE statement are correct in MySOL 5.6?

Which are valid MySQL DATETIME and TIMESTAMP value formats?

Which statements are true?

Which are valid MySQL Data type?

Considering table foo has been created with:

create table foo (id int primary key auto_increment, name varchar(100));

Is the following query syntactically valid?

delete from foo where id = id-1;

Which SQL function returns the current date?

What will be returned? SELECT column_name FROM table1 LEFT JOIN table2 ON table1.column_name=table2.column_name;