Categories
Software

圖示 SQL joins

Categories
DATABASE Programming/php System/Linux/Unix*

[memo] Oracle : 把資料用 UTF8 編碼存進 table / NLS_LANG / NCHAR / NVARCHAR / NLS_CHARACTERSET / NLS_NCHAR_CHARACTERSET / SQL plus

UTF8 sample: URL : http://www.unicode.org/cgi-bin/GetUnihanData.pl?codepoint=竝 Oracle : 把資料用16進位印出來 dump(field,16)   用 locale -a 看 系統支援的 locales 參考 : Oracle® Database Globalization Support Guide : http://docs.oracle.com/cd/E11882_01/server.112/e10729/toc.htm

Categories
DATABASE JOB

SQL 的 union 的作法

The UNION query allows you to combine the result sets of 2 or more “select” queries. It removes duplicate rows between the various “select” statements. select count(1) from (       — 賣家       select ctrl_rowid       from bidleader.sold_record s       where s.ctrl_date like ‘200701%’       group by ctrl_rowid       union       — 買家       select […]