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INNER JOIN
INNER JOIN 语法说明 语法结构 参数释义 示例 限制 INNER JOIN 语法说明 INNER JOIN 选取两个表中具有匹配值的数据记录。（等同于JOIN ） 语法结构 > SELECT column_name ( s ) FROM table1 INNER JOIN table2 ON ... -
LEFT JOIN
LEFT JOIN 语法说明 语法结构 示例 LEFT JOIN 语法说明 LEFT JOIN 关键字从左表（table1）返回所有的行，即使右表（table2）中没有匹配。如果右表中没有匹配，则结果为 NULL 。 说明 ：在一些数据库中：LEFT JOIN 等同于 LEFT OUTER JOIN 。 语法结构 > ... -
FULL JOIN
FULL JOIN 语法说明 语法结构 示例 FULL JOIN 语法说明 FULL JOIN 关键字只要左表（table1）和右表（table2）其中一个表中存在匹配，则返回行。 FULL JOIN 关键字结合了 LEFT JOIN 和 RIGHT JOIN 的结果。 说明 ：在一些数据库中：FULL JOIN 等同... -
LEFT JOIN
LEFT JOIN 语法说明 语法结构 示例 LEFT JOIN 语法说明 LEFT JOIN 关键字从左表（table1）返回所有的行，即使右表（table2）中没有匹配。如果右表中没有匹配，则结果为 NULL 。 说明 ：在一些数据库中：LEFT JOIN 等同于 LEFT OUTER JOIN 。 语法结构 > ... -
FULL JOIN
FULL JOIN 语法说明 语法结构 示例 FULL JOIN 语法说明 FULL JOIN 关键字只要左表（table1）和右表（table2）其中一个表中存在匹配，则返回行。 FULL JOIN 关键字结合了 LEFT JOIN 和 RIGHT JOIN 的结果。 说明 ：在一些数据库中：FULL JOIN 等同... -
Architecting Transactional Data Store applications
Architecting Transactional Data Store applications Architecting Transactional Data Store applications When building Transactional Data Store applications, the architecture deci... -
Recoverability and deadlock handling
Recoverability and deadlock handling Recoverability and deadlock handling The first reason listed for using transactions was recoverability. Any logical change to a database ma... -
Compatibility
Compatibility Compatibility The Berkeley DB Java API has been tested and shown to work with Java 6, 7, and 8 on Linux, Mac OS X, and Windows. The Berkeley DB Server requires Ja... -
Recovery and filesystem operations
Recovery and filesystem operations Recovery and filesystem operations The Berkeley DB API supports creating, removing and renaming files. Creating files is supported by the DB-... -
Access method tuning
Access method tuning Access method tuning There are a few different issues to consider when tuning the performance of Berkeley DB access method applications. access method An...