Database functions perform basic operations, such as count, max, and min, but they enable the user to specify criteria so that the operation only looks at selected records, and ignores other records in the database.
Ọrụ nchekwa data na-arụ ọrụ dị iche iche, dị ka ọnụ, max, na min, ma ha nyere onye ọrụ aka ịkọwa njirisi, nke mere na arụ ọrụ ahụ rụrụ na ihe ndekọ naanị.