A table can have only one primary key column.

Which of the following statements will create a table?

Consider the following empty table: CREATE TABLE example ( a integer, b integer, c integer, UNIQUE (a, c) ); Which of the following inserts will cause an error?

What is the ~ operator?

What is true regarding file system backup?

To backup a database, the postmaster daemon must be halted.

While creating a table with a field of the serial type, a sequence will be created.

An ISO-8601 time may be entered into a table using the numeric format 012411 instead of 01:24:11.

SELECT !!3;

What output will this statement give?

SELECT rtrim('foobar', 'abr');

The result of this statement is foo.

Which kind of index can be declared unique?