mybatisforeach tag usage

The foreach tag is the same as our Java is to traverse iterations, usually after the in keyword select * from tableName where id in (1,2) I usually put It serves as the condition in(1,2) select * from user where userRole in #{roleIds} Foreach attribute: collection: Iteration means passing Parameters entered item: an alias representing the iteration of each element in the collection index: used to represent the position iterated to during the iteration process open: Indicates what to start with separator: Indicates what symbol is used as a separator between each iteration close: Indicates what has ended