更改“成绩表”为列“column_b”设置“UNIQUE”约束。 ALTER TABLE 成绩表 ADD column_b VARCHAR(20) NULL CONSTRAINT b_unique UNIQUE

A column that fails due to normal stress, is called ( ) A: short column B: long column C: weak column D: medium column

Which one of the followings columns has the highest column efficiency? A: packed column B: WCOT column C: SCOT column D: PLOT column

Identify the column where the formatting rules have not been applied. A: Date column B: Ref column C: Item $ column D: Bal $ column

What is not included in the three column theory ( ). ____ A: Ant. Column B: Mid. Column C: Upper column D: Post. Colum

Column A ( Person )Column B ( Gift)

A column in journals and ledger accounts used to cross reference journal and ledger entries is the__________. A: account balance column B: debit column C: posting reference column D: credit column E: description column

_____ is a representation of the beauty of female. A: Doric column B: Ionic column C: Corinthian column

Match the words in Column A with their definitions in Column B

5.words, match, those, the, column, B, in, column, A, with, in