postgresqlHow do I use the PostgreSQL XML type?
PostgreSQL XML type is used to store XML data in a PostgreSQL database. It is a special data type that can store XML documents and fragments in a structured way.
To use the PostgreSQL XML type, you must first define a table with the XML type column. For example:
CREATE TABLE myTable (
id SERIAL PRIMARY KEY,
xml_data XML
);
This creates a table named myTable
with an id
column of type SERIAL
and a xml_data
column of type XML
.
Then, you can insert data into the table using the INSERT
statement. For example:
INSERT INTO myTable (xml_data)
VALUES ('<some_xml> <data>value1</data> <data>value2</data> </some_xml>');
Once the data is inserted, you can query the table and retrieve the XML data using the SELECT
statement. For example:
SELECT xml_data FROM myTable;
This will return the XML data stored in the xml_data
column.
You can also use XPath to query the XML data. For example:
SELECT xml_data->'data' FROM myTable;
This will return the value of the data
element from the XML data.
Helpful links
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