http://publib.boulder.ibm.com/infocenter/idshelp/v115/index.jsp?topic=/com.ibm.sqls.doc/ids_sqs_0187.htm List of Expressions Each category of SQL expression includes many individual expressions. The following table lists all the SQL expressions (and…
摘要: http://www.cloudera.com/content/cloudera-content/cloudera-docs/Impala/latest/Installing-and-Using-Impala/ciiu_langref_sql.html Impala SQL 语言元素(Elements) Impala SQL 方言支持一组标准元素(a range of standard elements),加上许多大数据方面的扩展,用于数据加载和数据仓库方面. 注意: 在之前的 Im…
python2.7默认的编码方式为ascii码,如下可以查询: import sys sys.getdefaultencoding() 如果直接在unicode和ascii字符串之间做计算.比较.连接,都会出错: s = '您好' u = u'您好' s == u __main__:1: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them…