2007-05-29
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DataBase Language

DDL Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples: CREATE - to create objects in the database ALTER - alters the structure of the database DROP - delete objects from the database TRUNCATE - remove all records from a table, including ...
2007-01-24
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Oracle 行列转换

关键字: Decode
因为数据是Oracle,所以可以使用Decode函数.我的表结构是这样的: id gender age 1 boy 22 2 boy 23 3 girl ...
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