mysql query help - REPLACE INTO?
I have a PHP file
that reads in a CSV file and stores the values into an SQL table.
The SQL table has 4 columns
id - primary key (just auto incremented integer)
name - text value of an object name
type - an integer value representing the type of object
active - a bool to set if the object is active
The problem is the CSV file
doesn't store the id, just the name and type.
I want to do the following and wondered what the best way to do this is with the least amount of queries.
set active to 0
for every entry in the table
For each entry in th开发者_运维问答e CSV
if (name and type already exists in table)
set active to 1
else
add new entry to the table
return the id for the existing or new entry
any help would be greatly appreciated
Thanks
- just a note, it's just the mysql queries i'm after, not php code etc...
Assuming you are using mysql:
First you have to create "unique" index on 2 fields: name
and type
(it's one index not two)
Then insert your data using this query:
INSERT INTO `table` (`name`,`type`,`active`) VALUES ($name,$type,0) ON DUPLICATE KEY UPDATE active = 1
In order to get ID you just query it (the smart way - mysql_insert_id() doesn't work with INSERT UPDATE)
SELECT id FROM `table` WHERE `name`= '$name' AND `type` = '$type'
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