TSV file, also known as Tab-separated values, is used in PostgreSQL. We can also separate the values using ‘|’, tabs’ \t’ or newline’ \n’. Below is the example in that we required the same name of column and data while importing data into the table.Ĭode: copy import_test (id) from '' DELIMITER ',' CSV /]# cat /Test.csvīasically, we have separate the values using a comma, but in some file, we have used another delimiter to separate the values. If column name and data is mismatch, then it will issue error as “ERROR: extra data after last expected column”. Mismatch of the column is not allowed while importing data from a CSV file. The number and data type of the columns in the CSV file need to be the same as those specified in the PostgreSQL table. To import data from a CSV file into a table, you need to create a table with the same name and structure as the CSV file. Create a table with same structure of CSV file To import the data from the CSV file into the table, we need to follow the below things, or same table is present on the database. We have using copy command in PostgreSQL to import the file. Data have their header to defined or import the data from a file.īelow is the working of import CSV file into the table in PostgreSQL. Header of CSV file: We define this as the column name of the table where we imported data from the CSV file.We can use any delimiter to separate the value of a column in PostgreSQL. Delimiter: This is defined as the value which was separated by a semicolon.In PostgreSQL, the file’s absolute path needs to be specified when using the “COPY” command to define the path. Filename or path of file: This is specify that name of file from which we have imported data into the table.From: This keyword is used to specify the CSV file name from which we have importing the data into the table.The column name specifies that we have to insert or load the data from the CSV file on which column that we have specify in copy command. Column name1 to column names: We have to define column name with the copy command.Table name: The table name specifies the name of the table on which we have imported the data from the CSV file.The copy command is very useful to import the data into the PostgreSQL table. Copy: This command in PostgreSQL is used to import the data from the CSV file into the table.COPY table_name (Column_name1, column_name2, …, column_nameN) from file_name (Path of file) Delimiter CSV COPY name_of_table from name_of_file Delimiter īelow is the parameter description syntax of import CSV into the PostgreSQL table.
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