一个简单条件的消灭。
In addition, triggers can now contain UPDATE, DELETE, and INSERT operations together in a single clause as the trigger event. For example.
另外，触发器现在可以在单一子句中同时包含UPDATE、DELETE和INSERT操作，作为一个触发器事件。
But a single clause tucked in the 74-page deal agreement set off a series of increasingly dire events that nearly scuttled the rescue brokered and financed by the Fed.
但在74页的交易协议中，有一条不起眼的条款引发了一系列惊人的事件，差点让美联储的救援努力失去意义。
If all the columns in the clause appear in the required sequence with a single index, the database server USES the index to read the rows in the ordered sequence, thus avoiding a sort.
如果该子句中所有的列都是以用单个索引要求的顺序出现的，那么数据库服务器就使用索引来按顺序读取行，因而避免了排序。
The single currency's architects put their faith in the "no bail-out" clause coupled with a "stability and growth pact".
单一货币的设计者们之所以对不设“拯救计划”条款这种抱有信心，是因为他们推出了“稳定与增长公约”。
Multiple slices of data can be returned in a single query by using grouping sets or super-groups (such as ROLLUP) in the GROUP-BY clause of the SQL statement.
通过在sql语句的GROUP BY子句中使用多个分组集或超级组(比如rollup)，可以在一个查询中返回数据的多个切片。
The second major function performed by a WHERE clause is to join multiple tables together into a single table that can be queried more easily.
WHERE 子句执行的第二个主要功能是将多个表连接到单个表中，从而更易于查询。
You have seen in update 9 that you can include multiple update operations for the same document in the MODIFY clause of a single update statement.
在更新9中已经看到，在一个更新语句的modify子句中可以包含对同一文档的多个更新操作。
The SQL generated by the previous instructions has only a single grouping set in the GROUP-BY clause.
前面步骤产生的SQL在GROUP BY子句中只有一个分组集。
Finally, note how the single row VALUES clause is used in the return statement to return the end result as a single-row table.
最后，注意在return语句中使用了单行的values子句，以便将最后的结果以单行的表的形式返回。
Code join predicates first, followed by local predicates (predicates on a single table) in the same order as the named tables appear in the FROM clause.
首先编码联接谓词，然后是本地谓词(单个表上的谓词)，顺序与from子句中的已命名表的顺序相同。
Code join predicates first, followed by local predicates (predicates on a single table) in the same order as the named tables appear in the FROM clause.
首先编码联接谓词，然后是本地谓词(单个表上的谓词)，顺序与from子句中的已命名表的顺序相同。
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