多项选择题
Which two are character manipulation functions?（）
A. TRIM B. REPLACE C. TRUNC D. TO_DATE E. MOD F. CASE
多项选择题 Which three are true?（）
单项选择题 Evaluate this SQL statement: In the statement, which capabilities of a SELECT statement are performed?（）
多项选择题 Which two statements are true about constraints? （）
