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php Programming Glossary: unique_idMerge a table and a change log into a view in PostgreSQL http://stackoverflow.com/questions/10109564/merge-a-table-and-a-change-log-into-a-view-in-postgresql for the table using the following query SELECT fltr_chg.unique_id fltr_chg.column_name chg_val.value FROM changes AS chg_val JOIN.. chg_val.value FROM changes AS chg_val JOIN SELECT chg_rec.unique_id chg_rec.column_name MAX chg_rec.updated_at FROM information_schema.columns.. source.column_name chg_rec.column_name GROUP BY chg_rec.unique_id chg_rec.column_name AS fltr_chg ON fltr_chg.unique_id chg_val.unique_id..
Is this a good hashing password function in PHP? If not, why not? http://stackoverflow.com/questions/16042128/is-this-a-good-hashing-password-function-in-php-if-not-why-not random_state this unique_id random '' count 6 if fh @fopen ' dev urandom' 'rb' random fread.. random '' for i 0 i count i 16 random_state md5 this unique_id . random_state random . pack 'H ' md5 random_state random.. if strlen hash 34 return hash return false function unique_id val microtime val md5 val return substr val 4 16 function _hash_crypt_private..
MySQL select random row with JOIN from two tables http://stackoverflow.com/questions/4209886/mysql-select-random-row-with-join-from-two-tables time it takes to run the query. I have 2 tables product_db unique_id index image url_title status index product_page id product_unique_id.. index image url_title status index product_page id product_unique_id index page_id index What I want to select is a random image.. b WHERE b.page_id 3 AND a.status 'Online' AND a.unique_id b.product_unique_id ORDER BY RAND LIMIT 1 This query takes around..
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