当带有默认值和 null str 在用户输入中使用 php 和 Z81C3ZB080DAD53EBF587E1

Question

Here I have a mysql table like this:

create table abc (
    name varchar(20) not null,
    value int not null default 20
)

and in the php page, I wanna use a uniform sql for all insert like this:

insert into abc values('first name', '30')

but sometimes, there maybe someone dont input a value and the insert sql will be like

insert into abc values('a name', '')

and why can't it work? The mysql says Incorrect integer value: '' for column... and I want it give the default value. How can I do that?

Answer 1

You can't insert a not-integer-value into your field if you have declared it as an integer with NOT NULL .

1) Either control the value via your code if you want to use the same INSERT statement in both cases...

$var = 30;
$SQL = "INSERT INTO abc () VALUES('first name', '".$var."')";

2)... or have two different INSERT s for your default values:

/* for the default value */
$SQL = "INSERT INTO abc (somefield) VALUES('first name')";