The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can take several seconds; with the ...
Dynamic PHP pages give you the option to choose a MySQL table dynamically from which to query. You must ensure that the table exists before running a query on the table. PHP has a quick function that ...
For tables with multi-column indexes, select by indexed columns may return incorrect results. DEFINE TABLE OVERWRITE person SCHEMALESS; DEFINE INDEX IF NOT EXISTS idx_person_name ON TABLE person ...
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