sql

9. Which of the following statements about Unions is true? (select all that apply) The UNION operator is used to combine the result-set of two or more SELECT statements The order of the SELECTed columns in a UNION does not matter Each SELECT statement within UNION must have the same number of columns The columns must also have similar data types 10. Data scientists need to use joins in order to: (select the best answer) Retrieve data from multiple tables. Filter data from multiple tables. Create new tables