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select * from tb where IF((@p:=INTERVAL(CONV(HEX(CONVERT((@c:=LEFT(name,1)) USING GBK)),16,10), 0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE, 0xBBF7,0xBBF7,0xBFA6,0xC0AC,0xC2E8,0xC4C3,0xC5B6,0xC5BE, 0xC6DA,0xC8BB,0xC8F6,0xCBFA,0xCDDA,0xCDDA,0xCDDA,0xCEF4, 0xD1B9,0xD4D1))=0, @c, CHAR(@p+64))='w';