Mysql Procedure syntax

DROP PROCEDURE `dg`//
CREATE DEFINER=`root`@`localhost` PROCEDURE `dg`(g int(32))
begin
declare p_a int(25);

declare no_more_rows boolean default FALSE;
declare cursor1 cursor for select id from chk;
declare continue handler for not found
set no_more_rows := TRUE;

open cursor1;
Loop1 : loop
fetch cursor1 into p_a;
if no_more_rows then
close cursor1;
leave Loop1;
end if;
select p_a;
end loop Loop1;
end

Comments

SQL_CALC_FOUND_ROWS command fetch row count without limit

select SQL_CALC_FOUND_ROWS from <tablename> where flag = 1 limit 10 and then select found_rows();

Reading Large JSON file through PHP Script

<?php /* cat mexico.geojson | wc sed ':a;N;$!ba;s/\n/ /g' mexico.geojson > mexico.geojson_out1 cat mexico.geojson_out1 | wc http://localhost/Utility/cord/largefile.php?filename=mexico.geojson_out1 sed -E 's/\{ "type": "FeatureCollection", "name": "mexico_administrative_osm_province_boundaries", "crs": \{ "type": "name", "properties": \{ "name": "urn:ogc:def:crs:OGC:1.3:CRS84" \} \}, "features": \[//g' ./mexico.geojson_out1 > mexico.geojson_out2 http://localhost/Utility/cord/largefile.php?filename=mexico.geojson_out2 sed -E 's/(\[|\{|\}|\])/ \1 /g' ./mexico.geojson_out2 > ./output/mexico.geojson_output http://localhost/Utility/cord/largefile.php?filename=output/mexico.geojson_output */ ini_set('max_execution_time', '500'); //300 seconds = 5 minutes ini_set('memory_limit', '1G'); //ini_set('max_execution...

Splitting Comma-Separated Values In MySQL

CREATE TABLE numbers (n INT); INSERT INTO numbers VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), select id, substring_index( substring_index(email_recipients, ',', n), ',', -1 ) as email from dashboards join numbers on char_length(email_recipients) - char_length(replace(email_recipients, ',', '')) >= n - 1 Reference Site : https://www.sisense.com/blog/splitting-comma-separated-values-in-mysql/

Shanky Phoenix

Search This Blog