-- All of this happens on your local SQL instance, since you already have the data there from your prior attempt -- Create your new tables with generated scripts from the old local ones, and add in the identity
="table")continue;String catName=String.Format("{0}",dRow["Table_Catalog"]),schName=String...
SqlConnection connection sql server 连接对象 IEnumerable<T> source 需要批量插入的数据源 string tableName = null 插入表名称【为NULL默认为实体名称】 int bulkCopyTimeout = 30 批量插入超时时间 int batchSize = 0 写入数据库一批数量【如果为0代表全部一次性插入】最合适数量【这取决于您的环境,尤其是行数...
此方案和其他网上的方案有些不同的是:不是将List先转换成DataTable,然后写入SqlBulkCopy的,而是使用一个实现IDataReader的读取器包装List,每往SqlBulkCopy插入一行数据才会转换一行数据 IDataReader方案和DataTable方案相比优点 效率高:DataTable方案需要先完全转换后,才能交由SqlBulkCopy写入数据库,而IDataReader方案可以边...
SqlBulkCopy位于位于命名空间System.Data.SqlClient下,主要功能是把其他数据源(数据行DataRow,数据表DataTable,数据读取器IDataReader等)的数据有效批量的导入到SQL Server表中的功能。类似与 Microsoft SQL Server 包中名为 bcp 的命令行应用程序。但是使用 SqlBulkCopy 类可以编写托管代码解决方案,性能上优于bcp命令行...
CREATE TABLE copy_test ( id int, age int, name text ) ; --导入数据至Hologres表。 COPY copy_test FROM STDIN WITH DELIMITER AS ',' NULL AS ''; 53444,24,wangming 55444,38,ligang 55444,38,luyong \. --查询表中的数据。 SELECT * FROM copy_test; 说明 PSQL客户端仅支持使用STDIN(标准...
SQL Server 2025 (17.x) Preview introduces TDS 8.0 support for the bcp utility. Syntax Console Copy bcp [database_name.] schema.{table_name | view_name | "query"} {in data_file | out data_file | queryout data_file | format nul} [-a packet_size] [-b batch_size] [-c] [-C ...
SQL authentication To use SQL authentication, in addition to the generic properties that are described in the preceding section, specify the following properties: Expand table PropertyDescriptionRequired userName The user name to be used when connecting to server. Yes password The password for the us...
TRUNCATE TABLE postgres=# copy t(f1,f3,f2) from '/data/pgxz/t.txt'; COPY 3 postgres=# select * from t; f1 | f2 | f3 | f4 ---+---+---+--- 1 | tdsql_pg | | 2 | pg'", xc%|2017-10-2818:24:05.643102| 3|pgxz|2017...
COPY copies data between tables and files.COPY FROM copies data from a file to a table. COPY TO copies data from a table to a file.If CNs and DNs are enabled in security