Hello I want to know the difference between these nodes thanks
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The DB Query Reader executes a SQL query and returns the result in the output. It requires an established DB connection.
Never used the Database Reader before, but going by the description in the Hub, it also executes an SQL query and returns the result. With this node, the connection can be either provided externally, via the input, or established internally via the settings of the node.
Legacy means that there exists a newer version of the node (likely the DB Query Reader). It still exists to facilitate backwards compatibility.
From a functional perspective, both nodes seem to do the same thing. For any new project, the current one should be used though.
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