相當於AWS Redshift的“ UNLOAD”語句的Azure SQL數據倉庫

Question

Azure SQL數據庫/數據倉庫中是否有任何命令與Redshift中的UNLOAD語句相似？

我正在Azure中尋找一條SQL語句，該語句將在Azure Blob中創建一個文件。

Answer 1

您正在尋找CREATE EXTERNAL TABLE AS SELECT。

從文檔：

CREATE EXTERNAL TABLE [ [database_name  . [ schema_name ] . ] | schema_name . ] table_name   
    WITH (   
        LOCATION = 'hdfs_folder',  
        DATA_SOURCE = external_data_source_name,  
        FILE_FORMAT = external_file_format_name  
        [ , <reject_options> [ ,...n ] ]  
    )  
    AS <select_statement>  
[;]  

<reject_options> ::=  
{  
    | REJECT_TYPE = value | percentage  
    | REJECT_VALUE = reject_value  
    | REJECT_SAMPLE_VALUE = reject_sample_value  
}  

<select_statement> ::=  
    [ WITH <common_table_expression> [ ,...n ] ]  
    SELECT <select_criteria>