CAST(x, AS type)
CAST(x, AS type) 用於將一個數據類型的值轉換為另一個數據類型的值
mysql> SELECT CAST(100 AS CHAR(2)); # 將整數類型100轉換為帶有兩個顯示寬度的字符串類型,結果為‘10‘ +----------------------+ | CAST(100 AS CHAR(2)) | +----------------------+ | 10 | +----------------------+
CAST(x, AS type)
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