Does datatype length affect the performance?
Question
I have a very general question regarding length of the data type. suppose i have assigned a varchar(2500) and i am using only up-to 100 bytes. will the rest of the unused length specified by me affect any thing?
2 answers
solution1
0 2013-04-12 06:41:39
VARCHAR仅占用100。剩余的内存将由其他字段使用。
solution2
0 2013-04-12 06:43:50
查看此参考（mysql）： http : //dev.mysql.com/doc/refman/5.0/en/char.html
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