在SQl 2005 For XMl 简单查询(Raw,Auto,Path模式)(1)里我们说了关于Path,Raw和Auto模式的用法,其实里面不仅仅 是这些简单的操作,还有一些其它的特性,比如说Type或OpenXml方法,sp_xml_preparedocument存储过程 等这些增加的东东,我们来一个一个的看吧, 第一个Type关键字,Type大家都 知道 英文意思是类型,在这里也...
public java.lang.Object toJdbc() throws java.sql.SQLExceptionConvert this data object into its default Java object type. Returns: the data value as a byte array. Throws: java.sql.SQLException - if any of the lower layer code throws an exception. Overrides: toJdbc in class Datum...
This package is necessary because normal SQL functions do not operate on RAWs, and PL/SQL does not allow overloading between a RAW and a CHAR datatype. UTL_RAW also includes subprograms that convert various COBOL number formats to, and from, RAWs. UTL_RAW is not specific to the databas...
Object-relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between incompatible type systems using object-oriented programming languages. This creates, in effect, a “virtual object database” that can be used from within the p...
DbRawSqlQuery 方法 AsStreaming 等于 ForEachAsync GetEnumerator GetHashCode GetType ToListAsync ToString 显式接口实现 DbRawSqlQuery<TElement> DbReferenceEntry DbReferenceEntry<TEntity,TProperty> DbSqlQuery DbSqlQuery<TEntity> DbUpdateConcurrencyException ...
SQL> alter table t_move move tablespace test; alter table t_move move tablespace test * ERROR at line 1: ORA-00997: illegal use of LONG datatype SQL> alter table t_move move tablespace users; alter table t_move move tablespace users * ERROR at line 1: ORA-00997: illegal use of ...
public java.lang.ObjecttoJdbc() throws java.sql.SQLException Convert this data object into its default Java object type. Specified by: toJdbcin classDatum Returns: the data value as a byte array. Throws: java.sql.SQLException- if any of the lower layer code throws an exception. ...
With that in mind, I think adding __len__ would be a nasty footgun, if you only want the number of rows, you can write a COUNT SQL query, if you want the count and the result, then you should definitely store the result in a list to avoid a second query. Of course we could ...
SqlQuery can also be used to return results from a view without mapping the view type in the EF model. For example: Copy var summariesFromView = await context.Database.SqlQuery<PostSummary>( @$"SELECT * FROM PostAndBlogSummariesView") .Where(p => p.PublishedOn >= cutoffDate && p....
target_datasource_type 否 String 目标端数据源类型。 target_datasource 否 String 目标端数据源名称。 target_ds_id 否 String 目标端数据源ID。 need_mqs 否 Boolean 线下版本是否使用MQS作为内部通道。 - true (使用) - false (不使用) need_api 否 Boolean 线下版本是否使用API作为内部通道。 - true (...