When you’re implementing custom module, normally you will have to re-run setup routines. Some people will create newer version of the setup file, but it will make you confuse after 100 modification. To do it, simply remove references to your modules in “core_resource” table and then, in backend, go to ‘System’ -> ‘Configuration’ -> ‘Advanced’ in Advanced Section, click ‘Save Config’. Magento will run all your setup scripts again.
Happy Magento’ing ~
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