Insert into … select … 是最慢的,而且生成最多的Undo和Redo信息,对I/O的压力最大,优势在于大家对它比较熟悉,使用起来比较简单,适合于处理少量的数据,若要处理大量的数据,不推荐使用这种方案。 Copy Command可以处理Create Table不能处理的情况,即向已有的数据表中追加记录,相对于insert来说,效率
COPY table_name [ ( column_name [, ...] ) ] FROM { 'filename' | PROGRAM 'command' | STDIN } [ [ WITH ] ( option [, ...] ) ] [ WHERE condition ] COPY { table_name [ ( column_name [, ...] ) ] | ( query ) } TO { 'filename' | PROGRAM 'command' | STDOUT } [...
COPY table_name [ ( column_name [, ...] ) ] FROM {'filename'| STDIN } [ [ USING ] DELIMITERS'delimiters'] [ WITHOUT ESCAPING ] [ LOG ERRORS ] [ LOG ERRORS data ] [ REJECT LIMIT'limit'] [ [ WITH ] ( option [, ...] ) ] | copy_option |FIXEDFORMATTER({ column_name( offs...
The integration runtime provides a built-in Oracle driver. Therefore, you don't need to manually install a driver when you copy data from and to Oracle.Get startedTo perform the Copy activity with a pipeline, you can use one of the following tools or SDKs:...
通过OleDbConnection的方法GetOleDbSchemaTable获取获取Excel的Sheet名 通过OleDbDataAdapter的Fill方法将数据填充到DataTable OracleBulkCopy
To enable the copying of data between Oracle and non-Oracle databases, NUMBER columns are changed to DECIMAL columns in the destination table. Hence, if you are copying between Oracle databases, a NUMBER column with no precision will be changed to a DECIMAL(38) column. When copying between Or...
querySpecifies the SQL query to read data from Snowflake. If the names of the schema, table and columns contain lower case, quote the object identifier in query e.g.select * from "schema"."myTable". Executing stored procedure isn't supported.No ...
number of tables from Azure SQL Database to Azure Synapse Analytics. You can apply the same pattern in other copy scenarios as well. For example, copying tables from SQL Server/Oracle to Azure SQL Database/Data Warehouse/Azure Blob, copying different paths from Blob to Azure SQL Database ...
Oracle Database Cloud Exadata Service - Version N/A and laterInformation in this document applies to any platform. This problem can occur on any platform.Symptoms ORA-00904: "<column name>": invalid identifier Will occur if a table that is being redefined has an index, constraint or trigger...
BulkInsertOrUpdate method can be used when there is need for both operations but in one connection to database. It makes Update when PK(PrimaryKey) is matched, otherwise does Insert.BulkInsertOrUpdateOrDelete effectively synchronizes table rows with input data. Those in Db that are not found...