ALTER TABLE `project_devices` ADD COLUMN `phase_type` text NOT NULL DEFAULT 'single_phase';
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UPDATE `project_devices`
SET `phase_type` = CASE WHEN `phase_count` = 3 THEN 'three_phase' ELSE 'single_phase' END;
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ALTER TABLE `project_devices` ADD COLUMN `connection_kind` text;
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ALTER TABLE `project_devices` ADD COLUMN `cost_group` text;
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ALTER TABLE `project_devices` ADD COLUMN `power_per_unit` real NOT NULL DEFAULT 0;
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UPDATE `project_devices` SET `power_per_unit` = `installed_power_per_unit_kw`;
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ALTER TABLE `project_devices` ADD COLUMN `simultaneity_factor` real NOT NULL DEFAULT 1;
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UPDATE `project_devices` SET `simultaneity_factor` = `demand_factor`;
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ALTER TABLE `project_devices` ADD COLUMN `cos_phi` real;
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UPDATE `project_devices` SET `cos_phi` = `power_factor`;
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ALTER TABLE `project_devices` ADD COLUMN `remark` text;
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UPDATE `project_devices` SET `remark` = `note`;