SQL> CREATE TABLE TEST2
As most DBA’s and developers that work with both SQL Server and Oracle already know, there are some differences in how you update rows using a join between SQL Server and Oracle. Notably, this is not possible with Oracle without some finesse. PostgreSQL has a similar ANSI SQL approach...
HelloDBA.com> exec sql_explain('select /*+NO_ADAPTIVE_PLAN*/* from t_tab t where table_name = any (select max(object_name) from t_obj o where o.owner=t.owner group by owner)', 'TYPICAL'); Plan hash value: 3428189515 --- | Id | Operation | Name | Rows | Bytes | Cost...
通过索引查询数据比全表扫描要快. 当ORACLE找出执行查询和Update语句的最佳路径时, ORACLE优化器将使用索引. 同样在联结多个表时使用索引也可以提高效率. 另一个使用索引的好处是,它提供了主键(primary key)的唯一性验证.。
exclude cross joins in RuleNoCondition4JoinWarning. if the input sql is a CREATE AS SELECT statement, optimize the as select statement. move mysql pk logic after duplicate with existing index. don't create index-only index if there is any json or xml typed column. Version 2024.1.12 ...
10a.BLOB_COL_VALUE AS blobColValue11</sql>1213<sqlid="blobFieldJoins">14</sql>151617SELECT18<includerefid="blobFieldColumns"/>19FROM BLOB_FIELD a20<includerefid="blobFieldJoins"/>21WHERE a.ID = #{id}22232425SELECT26<includerefid="blobFieldColumns"/>27FROM BLOB_FIELD a28<includerefid="...
Service Account: To connect to your SQL database and allow Microsoft Graph Connector to update records regularly, you need a service account with read permissions granted to the service account. Note If you use Windows authentication while configuring the Oracle SQL connector, the user with which ...
Learn how to convert Oracle database objects to SQL Server database objects with SSMA for Oracle, after you set options and connect to Oracle and SQL Server.
您已经完成了初始业务模型的构建,现在需要在继续开发前测试信息库。您可以先使用检查一致性选项来检查错误信息库。然后,您可以通过使用 Oracle BI Answers 运行查询来测试信息库。最后,您可以检查查询日志文件验证 Oracle BI Server 生成的 SQL。 要测试并验证数据库,执行以下步骤:...
Because cursors are closely associated with private SQL areas, the terms are sometimes used interchangeably. Stack space is memory allocated to hold session variables and arrays. The hash area is used to perform hash joins of tables. The bitmap merge area is used to merge data retrieved from ...