md5 in bigquery
在BigQuery中,我使用MD5函数作为:
1 | SELECT md5('<<some string>>') AS hashed |
它总是在字母的最后一个字母中返回"==",例如:
1 | R7zlx09Yn0hn29V+nKn4CA== |
为什么"=="总是和它一起出现?
当MD5返回
TO_HEX: Converts a sequence of BYTES into a hexadecimal STRING.
Converts each byte in the STRING as two hexadecimal characters in the
range (0..9, a..f).
1 | SELECT TO_HEX(md5('123456')) AS hashed |
返回:
1 | e10adc3949ba59abbe56e057f20f883e |
1 | SELECT MD5("Hello World") AS MD5,TO_HEX(MD5("Hello World")) AS BYTES,TO_BASE64(FROM_HEX(TO_HEX(MD5("Hello World")))) AS BASE64 |
具有以下输出:
1 2 | ROW |MD5 |BYTES |BASE64 1 |sQqNsWTgdUEFt6mb5y4/5Q== |b10a8db164e0754105b7a99be72e3fe5 |sQqNsWTgdUEFt6mb5y4/5Q= |