MySQL - Select Case

SELECT

CASE 1 WHEN TABLE_NAME = 'accesorios' THEN (SELECT distinct concat('

update ',table_schema,'.tipoactividaddetalle set URLComponente =''fragments/valuacion.html'' where Nombre like ''%valuac%''

') FROM INFORMATION_SCHEMA.TABLES where table_name = 'accesorios';);

UNION ALL

SELECT distinct concat('

INSERT INTO ',table_schema,'.configuracion

SELECT distinct 

	''IdTipoDeVenta'',''Endoso'', CONCAT(b.IdMarca, ''TV00006''),0

FROM

	general.marcas a, ',table_schema,'.tipoactividad b

WHERE

	 b.Clave not in ( ''0000000000'') and a.IdMarca IN (''153'',''259'',''264'',''265'');

') FROM INFORMATION_SCHEMA.TABLES  Where Table_name = 'accesorios'

UNION ALL

SELECT distinct concat('

ALTER TABLE ',table_schema,'.cotizacionaccesorios

ADD  IdColor VARCHAR(10) NULL DEFAULT ''0000000000'' AFTER Cantidad;

') FROM INFORMATION_SCHEMA.TABLES  Where Table_name = 'campanas';