MERGE 语法 merge语法 merge_update_clause语法 merge_insert_clause语法 用法 MERGE INTO后紧跟目标表;USING指插入或者更新的数据;ON是条件;MATCHAED指定满足条件执行UPDATE操作;NOT MATCHED指定不满足条件执行INSERT 操作。如: MERGE INTO bonus d USING (SELECT emp_id, salary, dept_id FROM emp WHERE dept_id...
如果把WITH后面换成SELECT,一点问题没有,但UPDATE就是报错,好奇怪,难道WITH这种间接地写法不能用于UPDATA。 一种说法是:“with必须紧跟引用的select语句,而不是delete,update,merge等” http://www.itpub.net/thread-1585644-1-1.html 提到可以用MERGE: --wkc168 发表于 2012-3-2 13:28mergeintoc using (se...
oracle merge同时包含增、删、改 Oracle数据库 原来一直没注意,merge是可以支持delete,只不过必须的是on条件满足,也就是要求系统支持逻辑删除,而非物理删除。 Using the DELETE Clause with MERGE Statements You may want to cleanse tables while populating or updating them. To do this, you may want to consi...
oracle merge同时包含增、删、改 原来一直没注意,merge是可以支持delete,只不过必须的是on条件满足,也就是要求系统支持逻辑删除,而非物理删除。 Using the DELETE Clause with MERGE Statements You may want to cleanse tables while populating or updating them. To do this, you may want to consider using the...
3.4 USING clause When you create your using clause with a MERGE statement, keep a few things in mind. First, when you use a sub query in the using clause, it can of course be a table, but it can also be a query against one or more other tables, or even a stored view. The view...
Oracle 对Delete,update,merge的操作限制在,只有操作的对象是分区表示,Oracle才会启动并行操作。原因在于,对于分区表,Oracle 会对每个分区启用一个并行服务进程同时进行数据处理,这对于非分区表来说是没有意义的。 分区表的并行属性只能在表级别设置,不能在分区级别设置。
Merge{ Using: []clause.Interface{ clause.Select{ Columns: func() (columns []clause.Column) { // HACK: I can not come up with a better alternative for now // I want to add a value to the list of variable and then capture the bind variable position as well columns = values.Columns...
transaction when a table is modified by an INSERT, UPDATE, DELETE, MERGE, SELECT with the FOR UPDATE clause, or LOCK TABLE statement. DML operations require table locks to reserve DML access to the table on behalf of a transaction and to prevent DDL operations that would conflict with the ...
2、MERGE INTO 的语法: 语法结构: MERGE [INTO [schema .] table [t_alias] USING [schema .] { table | view | subquery } [t_alias] ON ( condition ) WHEN MATCHED THEN merge_update_clause WHEN NOT MATCHED THEN merge_insert_clause; ...
Use the USING clause to specify the source of the data, this can be a table, view, or the result of a subquery.Use the ON clause to specify the condition upon which the MERGE operation either updates or inserts. For each row in the target table for which the search condition is true...