Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

mysql float ÀàÐͲåÈë²»³É¹¦

²âÊÔÓï¾äÈçÏ£º
int j = 12;
float f = 89.76f;
wsprintf(sql,"INSERT INTO T_Score(FId,FScore) VALUES (%d,%f)",j,f);
µ±Ö´ÐÐÕâÌõÓï¾ä²åÈëµ½mysqlÊý¾Ý¿âÊÇ£¬±¨´í1054ºÅ´íÎóÐÅϢΪunkown colum ¡®f'
˵Ã÷£¬ÎÒ¾ø¶ÔÔÚÊý¾Ý¿âÖж¨Òå¹ýFScoreÕâ¸ö×ֶΣ¬²¢ÇÒΪ¸¡µãÀàÐÍ
Çó¸÷λ´óϺ°ï°ï¿´¿´ÊÇʲôԭÒò£¬Ôõô¸ÄÕý°¡

´òÓ¡sqlÄÚÈÝΪ£ºINSERT INTO T_Score(FId,FScore) VALUES (12,f) ÔõôÊÇfÄØ ¶ø²»ÊÇ89.76

%f ÊÇʲôÓïÑÔÖеģ¿

CÓïÑÔÖеİ¡

CÓïÑÔÖÐÓÐÕâ¸ö%f£¿ ¿´Ò»ÏÂÊÖ²áÖÐÊÇÈçºÎ½âÊ͵ġ£

float g = 10.2f;
printf("%f",g);
Õâ¸ö¶¨ÒåûÓÐ´í°¡

²»Ðоͻ»³É 
wsprintf(sql,"INSERT INTO T_Score(FId,FScore) VALUES (%d,%d)",j,f);
°É£¬¹À¼ÆÕâ¸ö wsprintf ÓÐÊ²Ã´ÌØÊâ¡£

ллÄ㣬¸øÁËÎÒ˼·£¬ºÇºÇ½â¾öÁË »»³ÉÁËsprintf ¸ø·ÖÀ²£¬ºÇºÇ£¬·½±ãµÄ»°½»¸öÅóÓÑŶ£¬ÄÜ·ñÁôÏÂQQºÅ°¡

ºÇºÇ£¬ÕæÐÄллÁË


Ïà¹ØÎÊ´ð£º

c#¿ØÖÆMysql ʵÏÖ×Ô¶¯É¾³ý¹¦ÄÜ - .NET¼¼Êõ / C#

Óиöwinform³ÌÐò,ʹÓÃc#+mysql,ÐèÒªÔÚÒ»¸ö´°ÌåÉèÖÃmysql×Ô¶¯É¾³ý¹¦ÄÜ,°üÀ¨×Ô¶¯É¾³ý¶àÉÙÌì֮ǰµÄÊý¾ÝÒÔ¼°ÊÇ·ñ¿ªÆô×Ô¶¯É¾³ý¹¦ÄÜ,ÎÒ³ÌÐòÍ˳öºó,»¹Ôõô¿ØÖÆMysql×Ô¼ºÉ¾³ý°¡?ÊDz»ÊÇÒªÓÃmysqlµÄeventÀ´ÊµÏÖ?c#¿ÉÒÔµ÷ÓÃmysq ......

ÈçºÎ¶¨ÆÚɾ³ýmysqlÊý¾Ý - PHP / »ù´¡±à³Ì

ÇëÎÊÏÂÄܲ»ÄÜÔÙwindows϶¨ÆÚÇå¿ÕmysqlÒ»¸ö±íÖеÄÈ«²¿Êý¾Ý£¬ÓÃPHPʵÏÖ£¡
лл¸÷λÁË
¾Í±ÈÈçÒ»¸öÐÇÆÚÇå¿ÕÒ»´Î
±ÈÈçÿ¸öÐÇÆÚÁùÁãµãÇå¿ÕÒ»´Î£¡
ллÁË

¼Æ»®ÈÎÎñ...php....sql...truncate....OK

Äã¾ÍÕâ½ÓÔÚҳà ......

Mysql ʹÓÃÎÊÌâ - Java / Web ¿ª·¢

ÎÒµÄMysql ʹÓõÄʱºò ÓÃdos½¨Á¢µÄÊý¾Ý±í ÔÚdosÖÐÄÜÏÔʾ³öÖÐÎÄ 
µ«ÊÇÔÚ ÆäËûµÄ¿ÉÊÓÒ³Ãæ ºÍÍøÒ³Öж¼ÏÔʾÂÒÂë ÈçºÎ½â¾ö£¿
ÔÚmysql¿ØÖÆÌ¨:show variables like 'char%';Ìù½á¹û³öÀ´¿´¿´¡£

mysqlÃüÁîÐÐģʽÏÂ: ......

eclipseÁ¬½ÓmysqlÊý¾Ý¿â - Java / Eclipse

ÏÈÉÏ´íÎó
ÎÞ·¨Áª½ÓÊý¾Ý¿â
java.sql.SQLException: Before start of result set
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)
at com.mysql.jdbc.ResultSet.checkRowPos(ResultSet.java: ......

MysqlЧÂÊÎÊÌâ - ÆäËûÊý¾Ý¿â¿ª·¢ / MySQL/Postgresql

±í
CREATE TABLE `ch1` (
  `id` int(10) unsigned zerofill NOT NULL AUTO_INCREMENT,
  `no` int(10) unsigned DEFAULT NULL,
  `dtime` datetime DEFAULT NULL,
  PRIMARY KEY (`id ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ