REFERENCES
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C++ beginner(2)- variable
initialization int x{}; // x is filled with zeroes, so x == 0 int x{123}; int x(123); int …
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添加外键约束时报错： SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails
1、添加外键约束时报错： SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a …