SQL ×Ö·û´®º¯Êý
************************************************************
*
ASCII
--
->ASCII ( character_expression ) --->·µ»Ø×Ö·û±í´ïʽ×î×ó¶Ë×Ö·ûµÄ ASCII ´úÂëÖµ¡£
*
select
ascii
(
'
abcdef
'
)
*
CHAR
--
->CHAR ( integer_expression )--->½« int ASCII ´úÂëת»»Îª×Ö·ûµÄ×Ö·û´®º¯Êý¡£
*
SELECT
char
(
97
)
***************************************************************************************************************************************************************************************
*
NCHAR
--
->NCHAR ( integer_expression )--->¸ù¾Ý Unicode ±ê×¼Ëù½øÐе͍Ò壬Óøø¶¨ÕûÊý´úÂë·µ»Ø Unicode ×Ö·û¡£
*
select
nchar
(
31206
)
*
UNICODE
--
->UNICODE ( 'ncharacter_expression' )--->°´ÕÕ Unicode ±ê×¼µÄ¶¨Ò壬·µ»ØÊäÈë±í´ïʽµÄµÚÒ»¸ö×Ö·ûµÄÕûÊýÖµ¡£
*
select
unicode
(
'
ÇØ
'
)
***************************************************************************************************************************************************************************************
*
LTRIM
--
->LTRIM ( character_expression )--->ɾ³ýÆðʼ¿Õ¸ñºó·µ»Ø×Ö·û±í´ïʽ¡£
*
select
ltrim
(
'
abcde
'
)
*
RTRIM
--
->RTRIM ( character_expression ) --->½Ø¶ÏËùÓÐÎ²Ëæ¿Õ¸ñºó·µ»ØÒ»¸ö×Ö·û´®¡£
*
select
rtrim
(
'
abcde
'
)
***************************************************************************************************************************************************************************************
*
LOWER
--
->LOWER ( c
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