文、意如
查詢欄位為空的
SELECT * FROM grade WHERE english IS NULL;
查詢欄位不為空
SELECT * FROM grade WHERE english IS NOT NULL;
Yiru@Studio - 關於我 - 意如
2023-08-05
MySql-語法練習2-查詢練習-欄位是否為Null
Yiru@Studio
Yiru@Studio