![]() ![]() ![]() So their respective column names from the table are listed in a comma-separated list within parentheses at the end of the statement. They are in a different order than found in the table. In this example, only three of the columns possible are contained in the data text file. In this article, I show how to use the LOAD DATA statement to add data from comma-separated values (CSV) files and other plain text files. Below is an example of how this might look: To help with the import process, MySQL provides the LOAD DATA statement, which reads rows from a text file and inserts them into the target table. If the fields in the data text file are not in the same order or the file doesn't contain the same number of columns as the receiving table, a list of columns and their order needs to be given. The data is a CSV file with comma as separator and timestamp and string field value quoted by single quoteshow can i insert it into TDengine I am now using SQL to achieve that Single row or multiple rows specified with VALUES can be inserted into a specific table. LOAD DATA LOW_PRIORITY INFILE '/tmp/data.txt' To load the text file pet.txt into the pet table, use this statement: mysql> LOAD DATA LOCAL INFILE /path/pet. If the fields in the data text file are surrounded by characters like double-quotes, add the ENCLOSED BY clause like so: To have MySQL ignore the first lines of text, add the IGNORE clause to the end of the LOAD DATA INFILE statement like this: Sometimes the first row of a data text file will contain column headings. The statement would need to be entered like this: Suppose also that the fields are terminated with a. However, suppose that the rows in the text file start and end with double-quotes and a Windows hard-return (i.e., a return and a line-feed). If lines are terminated by a line-feed ( \n), it doesn't need to be specified since it's the default. The third line above specifies the vertical bar as the field delimiter.įor some text files, you may need to specify the line terminator. The INTO TABLE clause specifies the database and the table to import into. For a Windows server, the forward-slashes are still used for the file's path, but a drive may need to be specified at the beginning of the path (e.g, 'c:/tmp/prospects.txt'). The first line of this statement specifies the path and the name of the file to import. Below is what you might enter through the mysql client to import the data into the table table1 Suppose further that within the file there is one record per line and that the fields of each are separated by a vertical bar. As an example, suppose that you have a text file called data.txt in the /tmp directory. If you have a plain text file that contains data, the LOAD DATA INFILE statement can be used to import it into MySQL. How do I import data into MySQL from a simple text file?.You also need to update your query syntax to specify the column names you are inserting into. To do this, you need to read each row from your file and insert it into the database one row at a time. mysql> Create table employeetbl(Id Int, Name varchar(20), Country Varchar(20),Salary Int) Query OK, 0 rows affected (0.91 sec) Now, the transfer of data from a file to a database table can be done with the help of the following table. The split method splits the lines in the file on whitespace into a tuple, e.g., the string a b c is turned into the tuple ('a', 'b', 'c'), so that the list comprehension produces a list of tuples that can be fed into cursor.executemany to perform a bulk insert.Īs points out, you also have to specify the columns the values are associated to in your SQL query, e.g., INSERT INTO EM (field, spam, ham, eggs, price, ni) VALUES (%s, %s, %s, %s, %s, %s)Īre you trying to insert the entire text file into a string column in the database, or do you want to import tabular data into the database? It seems like you want to import tabular data based on the way you specified the values, so I'll use that as my assumption. We want to load the data of A.txt into the following table named employeetbl. Next, build a list of rows that you can feed into executemany: values = So maybe the file consists of 6 tab- or space-separated fields?įirst, split the file into lines with file.readlines() instead of file.read(). I have no idea how your text file is formatted, but file.read() gives you the whole file as a single string and it seems like you have six fields to fill. ![]()
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