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LENGTH (string ) //string³¤¶È
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mysql> select substring(’abcd’,0,2);
+———————–+
| substring(’abcd’,0,2) |
+———————–+
| |
+———————–+
1 row in set (0.00 sec)
mysql> select substring(’abcd’,1,2);
+———————–+
| substring(’abcd’,1,2) |
+———————–+
| ab |
+———————–+
1 row in set (0.02 sec)
TRIM([[BOTH|LEADING|TRAILING] [padding] from]string2) //È¥³ýÖ¸¶¨Î»ÖõÄÖ¸¶¨×Ö·û
UCASE (string2 ) //ת»»³É´óд
RIGHT(string2,length) //È¡string2×îºólength¸ö×Ö·û
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ABS (number2 ) //¾ø¶ÔÖµ
BIN (decimal_number ) //Ê®½øÖÆ×ª¶þ½øÖÆ
CEILING (numbe
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select
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core_vender_info
order
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convert
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