Determine whether two recent data items are different and have multiple fields. how can this problem be solved?
Source: Internet
Author: User
Determine whether two recent data items are different. multi-field data is collected every day. if you want to determine whether the two recent data items are changed, evaluate the statement, multi-field, mysql, and calculate the feature values of multiple fields, such as md5, saves data when receiving the database and determines whether the two recent data types are unique. multiple fields
Collect data every day and want to determine whether the two recent data changes the statement, multi-field, mysql
------ Solution --------------------
Calculate the feature values of multiple fields, such as md5. Save the values when receiving the data and determine whether the values are unique.
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