How to obtain the id of a record when inserting a record into mysql? how to obtain the id of this record when inserting a record into mysql? & nbsp; what is the effect I want? when inserting a record & nbsp; there is a field value to share with id: how to obtain the id value of this record when inserting a record into mysql
How to obtain the id value of this record when inserting a record into mysql
What is the effect I want? when inserting a record, the value of a field must be the same as that of id.
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LAST_INSERT_ID () + 1
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Suppose $ db is your database object, and $ SQL is the SQL statement you want to execute.
Run $ db-> query ($ SQL) first );
Run $ last_id = $ db-> insert_id ();
Then $ last_id is the ID you need
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Public function insert ($ data ){
If (! Is_array ($ data)
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Empty ($ data) return 0;
$ Data = $ this-> build_insert ($ data );
$ SQL = sprintf ("INSERT INTO % s", $ this-> table_name, $ data );
$ Result = $ this-> query ($ SQL );
Return $ this-> insert_id ();
}
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When the field id is set to AUTO_INCREMENT auto-increment, you can use the following method to obtain it:
Mysql function: LAST_INSERT_ID ();
Php function: mysql_insert_id ();
Note: If the field is not AUTO_INCREMENT, the above function returns 0;
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After insertion, mysql_insert_id () is the inserted id value.
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The mysql_insert_id () function returns the ID generated by the previous insert operation. If it is not the ID of AUTO_INCREMENT, then mysql_insert_id () returns 0.
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It can be the following idea:
1) insert the primary data first, and leave the field with the id sample value blank;
2) use $ id = mysql_insert_id () to obtain the id of the inserted data;
3) use the update table set field ={$ id} to update the field with the same value as the id.
Or first, find the current largest id, add 1 to the id, then manually insert the id and the field with the same value as the id, set their value to the id after the value is 1
