คอลัมน์แสดงผล permissions
รหัสตัวอย่าง
เปลี่ยนแปลงโต๊ะเพิ่มคอลัมน์
ALTER TABLE table
ADD COLUMN column VARCHAR (255) NOT NULL AFTER column;ภาษา sql เปลี่ยนแปลงบนโต๊ะ
-- With check if field already exists
IF NOT EXISTS(SELECT 1 FROM sys.columns
WHERE Name = N'Email'
AND Object_ID = Object_ID(N'dbo.Customers'))
BEGIN
ALTER TABLE Customers
ADD Email varchar(255);
ENDหน้าคล้ายกัน
คล้ายกันหน้ากับตัวอย่าง
ในภาษาอื่นๆ
หน้านี้อยู่ในภาษาอื่นๆ
empty row
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ดังอยู่ในนี้หมวดหมู่
ดังหน้ากับตัวอย่างอยู่ในหมวดหมู่
empty row