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int mysql_affected_rows ([ resource $link_identifier ] )

link_identifier ¿¡ ¸¶Áö¸· INSERT, UPDATE, REPLACE, DELETE ÁúÀÇ·Î ¿µÇâ¹ÞÀº Çà ¼ö¸¦ ¾ò½À´Ï´Ù.

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ÃÖ±Ù ÁúÀÇ°¡ ½ÇÆÐÇßÀ» °æ¿ì -1À» ¹ÝȯÇÏ°í, ±×·¸Áö ¾ÊÀ» °æ¿ì Àû¿ëµÈ ÇàÀÇ °³¼ö¸¦ ¹ÝȯÇÑ´Ù.

ÃÖ±Ù ÁúÀÇ°¡ WHERE ÀýÀÌ ¾ø´Â DELETE ÁúÀÇÀÏ °æ¿ì Å×À̺íÀÇ ¸ðµç ·¹Äڵ尡 »èÁ¦µÇÁö¸¸, 4.1.2 ¹öÀü ÀÌÈÄÀÇ MySQLÀº 0À» ¹ÝȯÇÑ´Ù.

UPDATE¸¦ »ç¿ëÇÒ ¶§, MySQLÀº ±âÁ¸ °ª°ú »õ·Î¿î °ªÀÌ µ¿ÀÏÇÑ Ä÷³µéÀº º¯°æÇÏÁö ¾ÊÀ» °ÍÀÌ´Ù. mysql_affected_rows()´Â Á¶°Ç¿¡ ÇØ´çÇÏ´Â ÇàÀÇ °³¼ö°¡ ¾Æ´Ñ ½ÇÁ¦ º¯°æµÈ ÇàÀÇ °³¼ö¸¦ Á¦°øÇÑ´Ù.

REPLACE ±¸¹®Àº µ¿ÀÏÇÑ ±âº»Å°ÀÇ ·¹Äڵ带 ¸ÕÀú »èÁ¦ÇÑ ´ÙÀ½ »õ ·¹Äڵ带 »ðÀÔÇÑ´Ù. °á±¹, ÀÌ ÇÔ¼ö´Â »ðÀÔµÈ ·¹ÄÚµå¼ö¿Í »èÁ¦µÈ ·¹ÄÚµå¼ö¸¦ ´õÇÑ °ªÀ» ¹ÝȯÇÑ´Ù.


http://docs.php.net/manual/kr/function.mysql-affected-rows.php
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