[orm] [bug]修复了 ORM 中with_loader_criteria()不会应用到Select.join()的 bug,其中 ON 子句被给定为普通的 SQL 比较,而不是作为关系目标或类似的东西。 这是在 2.0 版本中修复的同一问题的回溯,针对 2.0.22。 参考:#10365 1.4.51 发布日期:2024 年 1 月 2 日 orm [orm]
When two tables are delete-connected to the same table through CASCADE relationships, the two tables must not be delete-connected to each other where the delete rule of the last relationship in each path is RESTRICT or SET NULL. The delete rule specified in a FOREIGN KEY clause of the CREAT...
If the table is partitioned, the FILESTREAM_ON clause must be included, and must specify a partition scheme of FILESTREAM filegroups that uses the same partition function and partition columns as the partition scheme for the table. Otherwise, an error is raised. If the table isn't partitioned...
This partition scheme must use the same partition function and partition columns as the partition scheme for the table; otherwise, an error is raised. If the table isn't partitioned, the FILESTREAM column can't be partitioned. FILESTREAM data for the table must be stored in a single ...
If you need to append data to each other, you can use the union option in the physical layer of the canvas in Tableau. In some cases your database does not support this option, so you can use custom SQL instead. For example, suppose you have the following two tables: November and Dec...
If a table with the same name as the one to be copied already exists in the destination Oracle database, then: If the two tables do not have the same column definitions, the copy is not performed. If the two tables have the same column definitions and if Include Data was specified, th...
oracle+cx_oracle metadata.reflect(), 250 tables 60.4 6.8 Inspector()的行为变化 对于包含在 SQLite、PostgreSQL、MySQL/MariaDB、Oracle 和 SQL Server 中的 SQLAlchemy 内置方言,Inspector.has_table(),Inspector.has_sequence(),Inspector.has_index(),Inspector.get_table_names()和Inspector.get_sequence_names...
集合就是相同类型的元素的有序合集。它一个通用的概念,其中包含了列表、数组和其他相似的数据类型。每一个元素都有唯一的下标来标识当前元素在集合中的位置。PL/SQL提供了以下几种集合类型: 索引表,也称为关联数组,可以让我们使用数字或字符串作下标来查找元素。(这有点和其他语言中的哈希表相类似。) ...
The same rules can and should be applied to data columns. Again, you should use the least possible words to describe what is stored in that column, e.g., country_name, country_code, customer_name. If two tables will have columns with the same name, you could add something to keep the...
To achieve the same functionality of .WRITE with other character or binary data types, use the STUFF (Transact-SQL). Updating User-defined Type columns Updating values in user-defined type columns can be accomplished in one of the following ways: Supplying a value in a SQL Server system data...