不同的select sql在case語句中

Question

我需要將空行添加到sql結果中，以便始終有3行。如果我的查詢返回0行，我需要做一個空行的3個聯合，如果查詢返回1行，我需要UNION 2空行。如果查詢返回2行，我需要UNION只有一個空行，並且如果查詢返回3行，請添加空行。

我新手SQL和我是想這樣的：

SELECT CASE (COUNT(*) FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz)) 
WHEN 0 THEN (SELECT * FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz) 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo) 

WHEN 1 THEN (SELECT * FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz) 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo) 

WHEN 2 THEN (SELECT * FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz) 
UNION ALL Select DISTINCT '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo) 

WHEN 3 THEN (SELECT * FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz)) 
END 
FROM public_getxo_alumbrado_puntos_luz_soportes_demo; 

Answer 1

SELECT * 
FROM (
    SELECT 1 AS precedence, * FROM FROM public_getxo_alumbrado_puntos_luz_soportes_demo where id_punto_luz=CInt(Reports![TODO_horizontal]!id_punto_luz 
    UNION 
    SELECT 2 AS precedence, '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo 
    UNION 
    SELECT 3 AS precedence, '' as tipo_soporte , '' as subtipo_soporte, '' as soporte_ppal_forma, '' as material, '' as soporte_ppal_altura, '' as longitud, '' as soporte_aux_angulo, '' as modelo, '' as marca, '' as estado, '' as fecha_instalacion, '' as fecha_intervencion, '' as fecha_baja, '' as observaciones, '' as tipo_intervencion , CInt(Reports![TODO_horizontal]!id_punto_luz) as id_punto_luz, '' as id_soporte, '' as id_modelo from public_getxo_alumbrado_puntos_luz_soportes_demo 
    ) 
ORDER BY precedence 
LIMIT 3