轉換日期postgreSQL時出錯

Question

我正在嘗試使用以下代碼將varchar轉換為日期，並輸出以下錯誤，為什么？

ALTER TABLE import.employee
ALTER COLUMN birth_date
TYPE date
USING (birth_date::date);

---

    ERROR:  date/time field value out of range: "05/29/1960"
HINT:  Perhaps you need a different "datestyle" setting.
********** Error **********

ERROR: date/time field value out of range: "05/29/1960"
SQL state: 22008
Hint: Perhaps you need a different "datestyle" setting.

Answer 1

設置日期樣式之前：

set datestyle = mdy;

Answer 2

如果需要從birth_date獲取:: date，請首先使用Data Type Formatting Functions docs中的給定函數將DATE格式賦予字段。