diff --git a/doc/pcb_item.sql b/doc/pcb_item.sql
new file mode 100644
index 0000000..b9db6dd
--- /dev/null
+++ b/doc/pcb_item.sql
@@ -0,0 +1,18 @@
+SELECT
+	pdb_el.sn.seriennummer AS serial_number
+	,CAST(pdb_el.sn.produktionsauftrag AS INT) AS production_order
+	,pdb_el.sn.n AS batch_index
+	,(CASE WHEN pdb_el.auftraege.artikelcode LIKE 'T%' THEN CAST(SUBSTRING(pdb_el.auftraege.artikelcode, 2) AS INT) ELSE CAST(pdb_el.auftraege.artikelcode AS INT) END) AS article_code
+	,(CASE WHEN ISNULL(pdb_el.ems.Seriennummer) THEN pdb_el.auftraege.IX ELSE pdb_el.ems.Equi_index END) AS bom_index
+	,(CASE WHEN ISNULL(pdb_el.ems.Seriennummer) THEN FALSE ELSE TRUE END) AS has_ems_update
+	,pdb_el.stammdaten.bezeichnung AS description
+	,(CASE WHEN pdb_el.modulindex.modulindex = "" THEN NULL ELSE pdb_el.modulindex.modulindex END) AS module_index
+FROM pdb_el.sn
+JOIN pdb_el.auftraege ON pdb_el.sn.produktionsauftrag = pdb_el.auftraege.produktionsauftrag
+JOIN pdb_el.stammdaten ON pdb_el.auftraege.artikelcode = pdb_el.stammdaten.Artikelcode
+LEFT JOIN pdb_el.ems ON pdb_el.sn.seriennummer = pdb_el.ems.Seriennummer
+LEFT JOIN pdb_el.modulindex ON pdb_el.sn.seriennummer = pdb_el.modulindex.sn_lp
+WHERE 
+	pdb_el.sn.seriennummer IN (202274021, 202393044, 202332421, 202396148)
+	OR pdb_el.sn.seriennummer IN (203463293, 203535394, 203463311)
+	OR pdb_el.sn.seriennummer IN (2173276);