Remove or Trim First or Last Few Characters in MySQL Database with SQL ¿ì¼± Æ®¸²À» Á¦°ÅÇϰųª ¶Ç´Â SQL¿Í MySQL µ¥ÀÌÅͺ£À̽º¿¡¼­ ¸¶Áö¸· ¸îÀÚ¸¦

Another useful string function in MySQL database is TRIM() which will return a text string after removing the matching leading or trailing characters, also known as prefixes or suffixes. MySQL µ¥ÀÌÅͺ£À̽º¿¡ ¶Ç ´Ù¸¥ À¯¿ëÇÑ ±â´ÉÀ» À߶󳻱⠹®ÀÚ¿­ (¼ö)¿¡´Â ÀÏÄ¡ÇÏ´Â ¼±Çà ¶Ç´Â ÈÄÇà ¹®ÀÚ¸¦ Á¦°ÅÇÑ ÈÄ, Á¢µÎ»ç ȤÀº Á¢¹Ì»ç·Î ¾Ë·ÁÁø ¶ÇÇÑ ÅØ½ºÆ® ¹®ÀÚ¿­À» ¹ÝȯÇÑ´Ù. It¡¯s been described by MySQL reference as function that returns the string str with all remstr prefixes or suffixes removed. ±×°ÍÀ» ÇÔ¼ö·Î MySQLÀ» ÂüÁ¶ remstr Á¢µÎ»ç ¶Ç´Â Á¢¹Ì»ç¿Í ¹ÝȯÇÏ´Â ¸ðµç ¹®ÀÚ¿­ÀÇ Á¦°Å´Â str¿¡ ÀÇÇØ ¼³¸íµÇ°íÀÖ´Ù. If none of the specifiers BOTH, LEADING, or TRAILING is given, BOTH is assumed. ÁöÁ¤ÇÏ´Â °æ¿ì¿¡´Â µÑ ´Ù ¼±µµ ¶Ç´Â ÈÄÇà ¸ðµÎ¿¡°Ô ¾Æ¹« »ý°¢ÀÔ´Ï´Ù. remstr is optional and, if not specified, spaces are removed. remstrÀº ¿É¼ÇÀ̸ç, ÁöÁ¤ÇÏÁö ¾ÊÀ¸¸é °ø¹éÀÌ Á¦°ÅµË´Ï´Ù.

Syntax of TRIM(): ±¸¹® Àß¶ó³»±â () :

TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr FROM] str) Àß¶ó³»±â ([(µÑ´Ù | ´ëÇ¥ | ÈÄÇà) [remstr]]´Â str), Àß¶ó³»±â ([remstr]´Â str)

For example: ¿¹¸¦ µé¸é :

SELECT TRIM(¡¯ bar ¡®); ¼±Åà Àß¶ó³»±â ( '¹Ù');

will return ¡®bar¡¯ (spaces dropped). ¹Ýȯ '¹Ù'(°ø¹é) ¶³¾îÁø °ÍÀÔ´Ï´Ù.

SELECT TRIM(LEADING ¡®x¡¯ FROM ¡®xxxbarxxx¡¯); ¼±Åà Àß¶ó³»±â (´ëÇ¥ 'x'¸¦ 'xxxbarxxx');

will return ¡®barxxx¡¯ (only leading x characters is removed). 'barxxx'(´Ü ¼±µµ x ¹®ÀÚ¸¦ ¹ÝȯÇÕ´Ï´Ù)¸¦ Á¦°ÅÇÕ´Ï´Ù.

SELECT TRIM(BOTH ¡®x¡¯ FROM ¡®xxxbarxxx¡¯); ¼±Åà Àß¶ó³»±â (µÑ ´Ù 'x'¸¦ 'xxxbarxxx');

will return ¡®bar¡¯ (leading and trailing xs is dropped). ¹Ýȯ '¹Ù'(¼±µµÇϰí XSÀ» ¶³¾î¶ßÀÌ´Ù ÈÄÇà).

SELECT TRIM(TRAILING ¡®xyz¡¯ FROM ¡®barxxyz¡¯); ¼±Åà Àß¶ó³»±â (ÈÄÇà 'xyzÀÌ'¿¡¼­ 'barxxyz');

will return ¡®barx¡¯ (trailing xyz is cleared). 'barx'(ÈÄÇà xyzÀÌ Áö¿öÁý´Ï´Ù)¸¦ ¹ÝȯÇÑ´Ù.

This function is multi-byte safe. ÀÌ ±â´ÉÀº ¸ÖƼ - ¾ÈÀü ¹ÙÀÌÆ®. And it can also be used with other SQL command such as UPDATE to perform modification update directly on database table data with SQL statements using tool such as phpMyAdmin. phpMyAdminÀº SQL ¹®À» Á÷Á¢ µîÀ¸·Î ¾÷µ¥ÀÌ Æ®¿Í °°Àº µµ±¸¸¦ »ç¿ëÇÏ¿© µ¥ÀÌÅͺ£À̽º Å×À̺íÀÇ µ¥ÀÌÅ͸¦ ¼öÁ¤ ¾÷µ¥ÀÌ Æ®¸¦ ¼öÇàÇϵµ·Ï ±×¸®°í ±×°ÍÀº ¶Ç ´Ù¸¥ SQL ¸í·É°ú ÇÔ²² »ç¿ëÇÏ½Ç ¼öÀÖ½À´Ï´Ù.

IMPORTANT : This is a machine translated page which is provided "as is" without warranty. Áß¿ä :ÀÌ ±â°è´Â "º¸Áõµµ¾øÀÌÀÖ´Â ±×´ë·Î"Á¦°øµË´Ï´Ù ÆäÀÌÁö¸¦ ¹ø¿ªÇß´Ù. Machine translation may be difficult to understand. ±â°è ¹ø¿ªÀ» ÀÌÇØÇϱ⠾î·Á¿ï ¼öÀÖ½À´Ï´Ù. Please refer to À» ÂüÁ¶ÇϽñ⠹ٶø´Ï´Ù original English article ¿ø·¡ ¿µ¾î ¹®¼­ whenever possible. ¾ðÁ¦µç °¡´ÉÇÕ´Ï´Ù.

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