chart_variables
Data license: CC-BY
1 row where chartId = 1089
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Link | chartId | variableId |
---|---|---|
1089,832227 | Nitrogen fertilizer use per hectare of cropland 1089 | Nutrient nitrogen N (total) | 00003102 || Use per area of cropland | 005159 || Kilograms per hectare 832227 |
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CREATE TABLE chart_variables ( `chartId` integer NOT NULL, `variableId` integer NOT NULL, PRIMARY KEY (`chartId`, `variableId`), CONSTRAINT `FK_chart_variables_chartId` FOREIGN KEY (`chartId`) REFERENCES `charts` (`id`) ON DELETE CASCADE, CONSTRAINT `FK_chart_variables_variableId` FOREIGN KEY (`variableId`) REFERENCES `variables` (`id`) ON DELETE CASCADE );