@文心快码BaiduComateerror 1171 (42000): all parts of a primary key must be not null; if you need 文心快码BaiduComate 错误码 1171 (42000) 的含义 错误码 1171 (42000) 是一个 MySQL 数据库错误,表明在创建或修改表时违反了主键约束。具体来说,这个错误表明主键的一部分或全部字段被设置为允许空值(...
Describe the bug I received this error when I try to create a table. Cannot create table 1171 - All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead On QA_5_1 works, on master it doesn't (it adds the...
Error 1171: All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead
All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead This appears to have changed with MySQL 5.7.3 as indicated in the following change from that release: Columns in a PRIMARY KEY must be NOT NULL, but if declared explicitly as NULL produced no...
注意：MySQL字段尽量避免NULL，应该指定列为NOT NULL，除非你想存储NULL。在MySQL中，含有空值的列很难...
Hira, AngelaCheruvanky, AnitaCollier, JillChokhavatia, SitaOfficial journal of the American College of Gastroenterology | ACG
(mykey)); ERROR 1171: All parts of a PRIMARY KEY must be NOT NULL; If you need NULL in a key, use UNIQUE instead mysql>Suggested fix:Workaround: explicitly add NOT NULL to port to MySQL. Solution: remove error 1171 (perhaps make it a warning so that the SQL can still be used ...
Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear ...
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1.Do not allow the projector to overheat; the primary cause of lamp failure is excessive temperature stress. 2.Allow the projector lamp to cool for at least 10 minutes after powering down, and never move the projector during this period or while the lamp is on. The lamp is much more sus...