SQL convert 用法
CONVERT(data_type,expression[,style])
convert(varchar(10),字段名,转换格式)
说明:
此样式一般在时间类型(datetime,smalldatetime)与字符串类型(nchar,nvarchar,char,varchar)
相互转换的时候才用到.
例子:
SELECT CONVERT(varchar(30),getdate(),101) now
结果为:
now
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|09/15/2001
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style数字在转换时间时的含义如下:
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Style(2位表示年份) | Style(4位表示年份) | 输入输出格式
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0 | 100 | mon dd yyyy hh:miAM(或PM)
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1 | 101 美国 | mm/dd/yy
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2 | 102 ANSI | yy-mm-dd
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3 | 103 英法 | dd/mm/yy
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4 | 104 德国 | dd.mm.yy
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5 | 105 意大利 | dd-mm-yy
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6 | 106 | dd mon yy
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7 | 107 | mon dd,yy
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8 | 108 | hh:mm:ss
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9 | 109 | mon dd yyyy hh:mi:ss:mmmmAM(或PM)
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10 | 110 美国 | mm-dd-yy
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11 | 111 日本 | yy/mm/dd
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12 | 112 ISO | yymmdd
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13 | 113 欧洲默认值 | dd mon yyyy hh:mi:ss:mmm(24小时制)
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14 | 114 | hh:mi:ss:mmm(24小时制)
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20 | 120 ODBC 规范 | yyyy-mm-dd hh:mi:ss(24小时制)
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21 | 121 | yyyy-mm-dd hh:mi:ss:mmm(24小时制)
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