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I have 2 identical tables in 2 different databases that reside on the same server. What would be the best way to copy data from table to another?
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Definition and Usage. The <select> element is used to create a drop-down list. The <select> element is most often used in a form, to collect user input. The name attribute is needed to reference the form data after the form is submitted (if you omit the name attribute, no data from the drop-down list will be submitted) ...
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The select element represents a control for selecting amongst a set of options. The multiple attribute is a boolean attribute. If the attribute is present, then the select element represents a control for selecting zero or more options from the list of options.
JavaScript provides six methods to select an element from the document. getElementById – search element by element_id. getElementsByTagName – search element by tag name (e.g., span, div) getElementsByClassName – search element by class name. getElementsByName – search element by name attribute.
Use:
INSERT INTO db1.table1
SELECT *
FROM db2.table2 t2
WHERE NOT EXISTS(SELECT NULL
FROM db1.table1 t1
WHERE t1.col = t2.col)
The exists is simplified, but you left out if there's a primary key/auto_increment to worry about/etc.
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