＃1067 - 'bonusid'的默认值无效如何修复此错误？

Question

SQL query:

CREATE TABLE bonus(
bonusid INT( 10 ) DEFAULT  '0' NOT NULL AUTO_INCREMENT ,
empid INT( 10 ) DEFAULT  '0' NOT NULL ,
datebonus DATE DEFAULT  '0000-00-00' NOT NULL ,
bonuspayment VARCHAR( 200 ) NOT NULL ,
note TEXT NOT NULL ,
PRIMARY KEY ( bonusid )
);

MySQL said: Documentation

1067 - Invalid default value for 'bonusid'

Answer 1

You don't have to give default value for a primary key with auto increment value. Since you have defined bonusid as a primary key and has defined auto increment.So this will automatically create a new value for bonusid whenever a new record is inserted.So try like this

CREATE TABLE bonus(
   bonusid INT( 10 ) NOT NULL AUTO_INCREMENT ,
   empid INT( 10 ) DEFAULT  '0' NOT NULL ,
   datebonus DATE DEFAULT  '0000-00-00' NOT NULL ,
   bonuspayment VARCHAR( 200 ) NOT NULL ,
   note TEXT NOT NULL ,
   PRIMARY KEY ( bonusid )
);

Answer 2

default value is not allowed to the primary key because of if you used default value to primary key then some time the record is inserted as same and primary key is not allowed to insert same value in this column.

check this

CREATE TABLE bonus(
bonusid INT( 10 )  AUTO_INCREMENT ,
empid INT( 10 ) DEFAULT  '0' NOT NULL ,
datebonus DATE DEFAULT  '0000-00-00' NOT NULL ,
bonuspayment VARCHAR( 200 ) NOT NULL ,
note TEXT NOT NULL ,
PRIMARY KEY ( bonusid )
);

if you use some column as primary key then it is default not null is not use to declare this. refer this link for auto increment

http://www.w3schools.com/sql/sql_autoincrement.asp

Answer 3

Even though the bonusid column is NOT NULL - you don't have to specify a default value if it has the special auto_increment option when you create the table .

Try As follows:

CREATE TABLE bonus(
bonusid INT( 10 ) NOT NULL AUTO_INCREMENT ,
empid INT( 10 ) DEFAULT  '0' NOT NULL ,
datebonus DATE DEFAULT  '0000-00-00' NOT NULL ,
bonuspayment VARCHAR( 200 ) NOT NULL ,
note TEXT NOT NULL ,
PRIMARY KEY ( bonusid )
);

FIDDLE DEMO HERE