以下是我试图规范化的表格。但它包含NULL值(第2行,列ROOM和TUTOR)。如果表中有空值,我该如何进行规范化? ![以下是我试图规范化的表格。但它包含NULL值。如果表中有空值,我该如何进行规范化?] [1]
COURSE
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ROOM | TIME | COURSENO | COURSENAME | TUTOR |
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112 9:00 1264 FRENCH 1 JL |
NULL 8:00 1265 FRENCH 2 NULL |
138 9:00 1266 FRENCH 3 PS |
139 7:00 1562 SPANISH 1 KL |
139 8:00 1563 SPANISH 2 KL |
114 7:00 1564 SPANISH 3 KR |
138 8:00 1264 FRENCH 1 PS |
112 7:00 1264 FRENCH 1 JL |