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Self Joins
- Cross Join example
- Inner Join example
joins can be inefficent - they can require moving lots of data around and increase the data process from n to n * n
# Set the root path (that's our variable not Nginx variable) to the landing page template file | |
set $rootPath "/map.php"; | |
set $crawlerPath "/map.html"; | |
if ($http_user_agent ~ "Ask Jeeves/Teoma|AdsBot-Google|exabot|Mediapartners-Google|GoogleToolbar|Google Web Preview|googlebot|yahoo|bingbot|baiduspider|facebookexternalhit|twitterbot|rogerbot|linkedinbot|msnbot|embedly|quora link preview|showyoubot|outbrain|pinterest|slackbot|vkShare|W3C_Validator|WebCrawler|Screaming Frog SEO Spider|Slackbot-LinkExpanding|robot|crawler") { | |
set $isCrawler 1; | |
rewrite ^ $crawlerPath; | |
} | |
if ($isCrawler = 0) { | |
rewrite ^ $rootPath; |
–ctrl a c -> create new window | |
–ctrl a A -> set window name | |
–ctrl a w -> show all window | |
–ctrl a 1|2|3|… -> switch to window n | |
–ctrl a ” -> choose window | |
–ctrl a ctrl a -> switch between window | |
–ctrl a d -> detach window | |
–ctrl a ? -> help | |
–ctrl a [ -> start copy, move cursor to the copy location, press ENTER, select the chars, press ENTER to copy the selected characters to the buffer | |
–ctrl a ] -> paste from buffer |
function cart_notice() { | |
$free_shipping_settings = get_option( 'woocommerce_free_shipping_settings' ); | |
$maximum = $free_shipping_settings['min_amount']; | |
$current = WC()->cart->subtotal; | |
if ( $current < $maximum ) { | |
echo '<div class="woocommerce-message">Get free shipping if you order $ ' . ($maximum - $current) . ' more!</div>'; | |
} | |
} | |
add_action( 'woocommerce_before_cart', 'cart_notice' ); |