Difference between revisions of "CIMMYT Database"
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Revision as of 18:06, 12 June 2017
The CIMMYT database contains phenotypic field data that was collected for CIMMYT experiments collected at multiple locations.
The CIMMYT database schema is shown in the figure below:
Example Queries
Row-to-Column Query
FOR QUERY OF REPEATED MEASUREMENTS: This query can be used to extract a column format of a repeat measurements (over dates) for multiple traits.
The query below is an example of how to generate a report of the G-NDVI and R-NDVI traits from the 16OBR plots with B2I conditions, (bed planting and two irrigations) for the Elite Yield Trial (EYT).
SET SESSION group_concat_max_len = 10000; USE cimmyt; SET @SQL = NULL; CREATE TEMPORARY TABLE IF NOT EXISTS p AS (SELECT * FROM phenotypes WHERE (YEAR(phenotype_date) = 2016 AND phenotype_value IS NOT NULL AND plot_id LIKE '16-OBR-B2I-EYT%' AND trait_id LIKE '%NDVI%')); SELECT GROUP_CONCAT(DISTINCT CONCAT('MAX(IF(p.phenotype_date = ''', `phenotype_date`, ''',p.phenotype_value,NULL)) AS ''', `phenotype_date`,'''') ORDER BY `phenotype_date` ASC ) INTO @SQL FROM p; SET @SQL = CONCAT('SELECT p.plot_id,p.trait_id, ', @SQL, ' FROM p GROUP BY p.plot_id,p.trait_id ORDER BY p.plot_id'); PREPARE stmt FROM @SQL; EXECUTE stmt; DEALLOCATE PREPARE stmt; DROP TEMPORARY TABLE p;
