怎么可能呢？
我发现它是为了检查列是否存在

(
SELECT 1 FROM Information_schema.columns
WHERE table_schema = 'db' 
AND table_name = 'table' 
AND column_name = 'the other column'
)

并在另一列之后添加该列

ALTER TABLE 'table' ADD 'the column' VARCHAR(14) DEFAULT NULL AFTER 'the other column'