Wildcard path name matching is case-sensitive.Wildcards cards can be included in the path where This behavior is the same even when specifying a path with a wildcard. COPY ignores hidden folders and doesn't return files that begin with an underline (_) or a period (.) unless explicitly specified in the path. If a folder is specified, COPY will retrieve all files from the folder and all its subfolders. Path - the folder or file path for the data. dfs is not required for your authentication method. blob endpoint is available for ADLS Gen2 as well and currently yields the best performance. Currently Azure Data Lake Storage (ADLS) Gen2 and Azure Blob Storage are supported: Is where the files containing the data is staged. When a column list is not specified, COPY will map columns based on the source and target ordinality: Input field 1 will go to target column 1, field 2 will go to column 2, etc. Field_number - the input file field number that will be mapped to the target column name.Default value is preceded by the keyword 'default' COPY will attempt to load NULL from the input file when a column is omitted from the column list or when there is an empty input file field. Default value applies to all file formats. Default_value - the default value that will replace any NULL value in the input file.Column_name - the name of the column in the target table.The column list is of the following format: Is an optional list of one or more columns used to map source data fields to target table columns for loading data.ĭo not specify a column_list when AUTO_CREATE_TABLE = 'ON'.Ĭolumn_list must be enclosed in parentheses and delimited by commas. For automatic schema detection mode, do not provide a column list.
The target table can be a temporary or permanent table and must already exist in the database. Is the name of the table to COPY data into. If schema is not specified, and the default schema of the user performing the COPY operation is different from the specified table, COPY will be canceled, and an error message will be returned. Is optional if the default schema for the user performing the operation is the schema of the specified table. Quickstart: Creating the COPY statement using the rich Synapse Studio UI.Quickstart: Examples using the COPY statement and its supported authentication methods.Quickstart: Bulk load data using the COPY statement.Visit the following documentation for comprehensive examples and quickstarts using the COPY statement: The automatic table creation process automatically creates the tables and works alongside with automatic schema discovery.Automatic schema discovery simplifies the process of defining and mapping source data into target tables.Specify wildcards and multiple files in the storage location path.Leverage SQL Server Date formats for CSV files.Specify a custom row terminator for CSV files.Customize default values for each target column and specify source data fields to load into specific target columns.
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This article explains how to use the COPY statement in Azure Synapse Analytics for loading from external storage accounts.
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