How to decrease database size in Magento?
To decrease database size you take below action. It will not effect your database. You can say this is unwanted data.
TRUNCATE dataflow_batch_export;
TRUNCATE dataflow_batch_import;
TRUNCATE log_customer;
TRUNCATE log_quote;
TRUNCATE log_summary;
TRUNCATE log_summary_type;
TRUNCATE log_url;
TRUNCATE log_url_info;
TRUNCATE log_visitor;
TRUNCATE log_visitor_info;
TRUNCATE log_visitor_online;
TRUNCATE report_viewed_product_index;
TRUNCATE report_compared_product_index;
TRUNCATE report_event;
TRUNCATE index_event;
TRUNCATE catalog_compare_item;
TRUNCATE catalogindex_aggregation;
TRUNCATE catalogindex_aggregation_tag;
TRUNCATE catalogindex_aggregation_to_tag;
Hope it will work.