1.round(P1, P2) \u51fd\u6578\u662f\u56db\u6368\u4e94\u5165\u7528\uff0c\u7b2c\u4e00\u500b\u53c3\u6578\u662f\u6211\u5011\u8981\u88ab\u64cd\u4f5c\u7684\u6578\u64da\uff0c\u7b2c\u4e8c\u500b\u53c3\u6578\u662f\u8a2d\u7f6e\u6211\u5011\u56db\u6368\u4e94\u5165\u4e4b\u5f8c\u5c0f\u6578\u9ede\u5f8c\u986f\u793a\u5e7e\u4f4d\u3002<\/p>\n\n\n\n
2.numeric(P1, P2) \u51fd\u6578\u76842\u500b\u53c3\u6578\uff0c\u7b2c\u4e00\u500b\u8868\u793a\u6578\u64da\u9577\u5ea6\uff0c\u7b2c\u4e8c\u500b\u53c3\u6578\u8868\u793a\u5c0f\u6578\u9ede\u5f8c\u4f4d\u6578\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
select cast(round(23.5,2) as numeric(5,2)) --\u7d50\u679c\uff1a23.50\nselect cast(round(23.555,2) as numeric(5,2)) --\u7d50\u679c\uff1a23.56\nselect cast(round(234.5255,2) as numeric(5,2)) --\u7d50\u679c\uff1a234.53\nselect cast(round(2345.5255,2) as numeric(5,2)) --\u7d50\u679c\uff1a\u5831\u932f\u4e86\uff01\nArithmetic overflow error converting numeric to data type numeric.<\/code><\/pre>\n\n\n\n\u539f\u56e0\u662f\uff1a2345.5255\uff0c\u6574\u6578\u4f4d\u662f4\uff0c\u5c0f\u6578\u4f4d\u662f2\uff0c\u52a0\u8d77\u4f864+2=6\uff0c\u8d85\u51fa\u4e86numeric\u8a2d\u7f6e\u76845\u4f4d\uff0c\u6240\u4ee5\u70ba\u4e86\u4fdd\u96aa\uff0c\u53ef\u4ee5\u589e\u6e1bnumeric\u7684\u53c3\u6578\uff0c\u4f8b\u5982numeric(20,2)\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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