如何在PHP中一起执行多个mysql查询？

Question

I want to a select query and an insert query that I want to do them together using function(mysql_query),but it's not working. I'm tying to do somthing like this:

$sql="select * from texts; insert into date ('time') values ('2012');";
mysql_query($sql);

is there any way to do it?

Answer 1

mysql_query() sends a unique query (multiple queries are not supported) . That's the default behaviour.However there is a bypass for this.

However the result code of the first query alone will be given as output of mysql_query() if you do this.

You just have to pass flag 65536 as mysql_connect's 5th parameter . the flag is defined in MySQL Client flags .

#define CLIENT_MULTI_STATEMENTS 65536 /* Enable/disable multi-stmt support */
#define CLIENT_MULTI_RESULTS 131072 /* Enable/disable multi-results */

So edit your mysql_connect() code to match this:

mysql_connect($host, $username, $password, false, 65536);

Warning:

1. You will get the result of mysql_query($query) for the first query only in the given $query . You can try concatenating 131072 with 65536 for getting multiple results.
2. This will not work on PHP < 4.3.0
3. This will not work if sql.safe_mode is set as 1 in php.ini

---

Another alternative will be to use mysqli instead of mysql library. It supports $mysqli->multi_query() and gives output within an array for each query.

Answer 2

MySQL不允许在单个语句中传递多个select查询。

Answer 3

mysql_query() doesn't support multiple queries execution in normal way. use something like below.

<?php
$str="query1;query2;"; // say $str="select * from texts; insert into date ('time') values ('2012');";

$query = explode(';',$str);

// Run the queries
foreach($query as $index => $sql)
{
   $result = mysql_query($sql);    
   // Perform an additional operations here
}
?>

Answer 4

None of the mysql api can deal with several queries simultaneously, even mysql consol utility parses your input and executes one query after another and php's mysql_query doesn't. You just can write your own function doing it or just put all queries in an array and execute mysql_query for each element in a loop.

Answer 5

You can use mysqli_multi_query function but with PHP mysqli extension. (I recommend you to use mysqli instead of mysql extension of PHP because it includes much more features & facilities)

Answer 6

mysql_query() sends a unique query

see mysql_query

for multiple query you can see mysqli