在 MySQL 中查询特定长度的字符串字段

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时间:2020-08-31 18:40:48  来源:igfitidea点击:

Query in MySQL for string fields with a specific length

mysqlsqlstring

提问by ana

How can I make a MySQL query asking for all the string fields in a column that have a particular length?

如何进行 MySQL 查询,要求列中具有特定长度的所有字符串字段?

Thanks!

谢谢!

回答by BoltClock

Use LENGTH()for checking length in bytes:

使用LENGTH()的字节长度检查:

SELECT str FROM sometable WHERE LENGTH(str) = 5;

Or CHAR_LENGTH()for checking length in number of characters (useful for multi-byte strings):

或者CHAR_LENGTH()检查字符数的长度(对于多字节字符串很有用):

SELECT str FROM sometable WHERE CHAR_LENGTH(str) = 5;

回答by John K.

select * 
from myTable 
where length(myColumn) = 5