chart_variables
Data license: CC-BY
1 row where chartId = 1001
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Link | chartId | variableId |
---|---|---|
1001,904838 | Tractors per 100 square kilometers of arable land 1001 | Agricultural machinery, tractors per 100 sq. km of arable land 904838 |
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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 );