CREATE EXTERNAL TABLE 'order.tbl' USING (DELIMITER '|') AS SELECT * from orders; CREATE EXTERNAL TABLE 'export.csv' USING (DELIMITER ',') AS SELECT foo.x, bar.y, bar.dt FROM foo, bar WHERE foo.x = bar.x; 從外部表格載入資料: INSERT INTO target SELECT * FROM EXTERNAL 'data.txt'...
准备数据。首先需要设置secure_file_priv的路径为/home/admin/,将要导入的外表数据所对应的 CSV 文件extdata.csv放在当前本地连接的 OBServer 节点的/home/admin/test路径中。 设置全局安全路径的示例如下。 obclient>SET GLOBAL secure_file_priv=""Query OK,0rows affected obclinet>\q Bye ...
准备数据。首先需要设置secure_file_priv的路径为/home/admin/,将要导入的外表数据所对应的 CSV 文件extdata.csv放在当前本地连接的 OBServer 节点的/home/admin/test路径中。 设置全局安全路径的示例如下。 obclient>SET GLOBAL secure_file_priv=""Query OK,0rows affected obclinet>\q Bye ...
While tables typically reside in a database, an external table resides in a text-based, delimited file, or in a fixed-length-format file outside of a database.
External table name: SalesOrder Linked service: Selectsynapsexxxxxxx-WorkspaceDefautStorage(datalakexxxxxxx) Input file of folder: files/RetailDB/SalesOrder Continue to the next page and then create the table with the following options: File type: CSV ...
hive struct生成 hive create external table 一、创建表 1.1内部表 create table 数据库名.表名( 属性(一般都用string类型) ) row format delimited fields terminated by ',' stored as textfile -- 文本文件 stored as orc -- orc压缩文件,压缩后别人无法读取...
CREATEEXTERNALTABLESpecialOrdersWITH(-- details for storing resultsLOCATION ='special_orders/', DATA_SOURCE = files, FILE_FORMAT = ParquetFormat )ASSELECTOrderID, CustomerName, OrderTotalFROMOPENROWSET(-- details for reading source filesBULK'sales_...
LOCATION = 'folder_or_filepath' 为Azure Data Lake、Hadoop 或 Azure Blob 存储中的实际数据指定文件夹或文件路径和文件名。 位置从根文件夹开始。 根文件夹是外部数据源中指定的数据位置。 如果路径和文件夹不存在...
Choose the schema-defining file by selecting the circle to the left of the file. This file will be used to generate the table schema. SelectNext: schema. TheSchematab opens. Schema tab In the right-hand side of the tab, you can preview your data. On the left-hand side, you can add...
Comma-separated values (CSV) JSON (newline-delimited) Avro ORC Parquet Datastore exports Firestore exports BigQuery supports querying Cloud Storage data from these storage classes: Standard Nearline Coldline Archive To query a Cloud Storage external table, you must have permissions on both the external...