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newbiethetest/mysql.txt

Created February 12, 2014 07:07
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mysql.txt
数据库某表TABLE_1内容如下：
LINE_A LINE_B
a 1
a 2
b
b 3
c
c
d 7
d 8
d
求一SQL语句，取完后的数据如下
LINE_A LINE_B
a 2
b 3
c
d 8
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