Can anyone please assist me?
I have attached 2 input files and one output file. I need to generate the sql update statements using the above 2 input files. if input_file2 has 5 rows, then we should generate 5 update statements because column1 is unique. input_file1 and input_file2 may contain more columns. I have added only few columns in my sample files. The output file should generate the sql update statements for the uncommented columns, but the positions should be correct.
Please let me know if you need any other clarification.
Thanks
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LEARN ABOUT PHP
mysqli_affected_rows
MYSQLI_AFFECTED_ROWS(3) 1 MYSQLI_AFFECTED_ROWS(3)mysqli::$affected_rows - Gets the number of affected rows in a previous MySQL operation
Object oriented style
SYNOPSIS
int$mysqli->affected_rows ()
DESCRIPTION
Procedural style
int mysqli_affected_rows (mysqli $link)
Returns the number of rows affected by the last INSERT, UPDATE, REPLACE or DELETE query.
For SELECT statements mysqli_affected_rows(3) works like mysqli_num_rows(3).
PARAMETERS
o $
link -Procedural style only: A link identifier returned by mysqli_connect(3) or mysqli_init(3)RETURN VALUES
An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records were updated for an UPDATE
statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the query returned an
error.
Note
If the number of affected rows is greater than the maximum integer value(
PHP_INT_MAX ), the number of affected rows will be returned as a string.
EXAMPLES
Example #1
$mysqli->affected_rows example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s
", mysqli_connect_error());
exit();
}
/* Insert rows */
$mysqli->query("CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %d
", $mysqli->affected_rows);
$mysqli->query("ALTER TABLE Language ADD Status int default 0");
/* update rows */
$mysqli->query("UPDATE Language SET Status=1 WHERE Percentage > 50");
printf("Affected rows (UPDATE): %d
", $mysqli->affected_rows);
/* delete rows */
$mysqli->query("DELETE FROM Language WHERE Percentage < 50");
printf("Affected rows (DELETE): %d
", $mysqli->affected_rows);
/* select all rows */
$result = $mysqli->query("SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %d
", $mysqli->affected_rows);
$result->close();
/* Delete table Language */
$mysqli->query("DROP TABLE Language");
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
if (!$link) {
printf("Can't connect to localhost. Error: %s
", mysqli_connect_error());
exit();
}
/* Insert rows */
mysqli_query($link, "CREATE TABLE Language SELECT * from CountryLanguage");
printf("Affected rows (INSERT): %d
", mysqli_affected_rows($link));
mysqli_query($link, "ALTER TABLE Language ADD Status int default 0");
/* update rows */
mysqli_query($link, "UPDATE Language SET Status=1 WHERE Percentage > 50");
printf("Affected rows (UPDATE): %d
", mysqli_affected_rows($link));
/* delete rows */
mysqli_query($link, "DELETE FROM Language WHERE Percentage < 50");
printf("Affected rows (DELETE): %d
", mysqli_affected_rows($link));
/* select all rows */
$result = mysqli_query($link, "SELECT CountryCode FROM Language");
printf("Affected rows (SELECT): %d
", mysqli_affected_rows($link));
mysqli_free_result($result);
/* Delete table Language */
mysqli_query($link, "DROP TABLE Language");
/* close connection */
mysqli_close($link);
?>
The above examples will output:
Affected rows (INSERT): 984
Affected rows (UPDATE): 168
Affected rows (DELETE): 815
Affected rows (SELECT): 169
SEE ALSO mysqli_num_rows(3), mysqli_info(3).
PHP Documentation Group MYSQLI_AFFECTED_ROWS(3)