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No duplicate data in the same field of different databases
2022-07-29 08:44:00 【CSDN Q & A】
The phenomenon and background of the problem
Two databases A and B,A There are two tables in the database a,B There are two tables in the database b, The fields of both tables are the same , How to query non duplicate data in two tables ？
Operating environment 、 Software version and other information
Navicat
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