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私はANSがMySQLのタイムスタンプ質問
Only the first statement succeeds, and the TIMESTAMP column is set to the current date and time. The other two statements give an error: mysql> INSERT INTO timestamptest SET ts1=NULL, i=10; Query OK, 1 row affected (0.00 sec) mysql> INSERT INTO timestamptest SET ts1=0, i=11; ERROR 1292 (22007): Incorrect datetime value: '0' for column 'ts1' at row 1 mysql> INSERT INTO timestamptest SET ts1='', i=12; ERROR 1292 (22007): Incorrect datetime value: '' for column 'ts1' at row 1
ですが、私は、TS1 = 0作品を挿入し、しようとしたとき、それがゼロ値のタイムスタンプを挿入し、いくつかの練習問題で
Assume that you've just created this table: CREATE TABLE timestamptest ( ts1 TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, i INT ); When you look at its structure, you will notice that the TIMESTAMP column is declared NOT NULL. What happens if you insert these records: mysql> INSERT INTO timestamptest SET ts1=NULL, i=10; mysql> INSERT INTO timestamptest SET ts1=0, i=11; mysql> INSERT INTO timestamptest SET ts1='', i=12;
を探しています...答えは間違っていますか?