diff --git a/sqlFunctions.R b/sqlFunctions.R
index d697b1a..a101683 100644
--- a/sqlFunctions.R
+++ b/sqlFunctions.R
@@ -27,17 +27,23 @@ sqlBackUp<-function(dbfile=file,bu.dir){
 }
 
 sqlShowSamples<-function(conn=dta, nhcs=nhc.test, verb=F, dbtype){
+  if (dbtype == "OV"){
+    db<-c("dbtables"="SAMPLES", "dbcode"="OVID", "dbsamples"="samples")
+    query<-paste0("SELECT O.NHC,S.* FROM ",db["dbtables"]," S INNER JOIN ",db["dbcode"]," O ON O.",db["dbcode"],"=S.",db["dbcode"])
+  }
+  if (dbtype == "UM"){
+    db<-c("dbtables"="MUESTRAS", "dbcode"="UMID", "dbsamples"="CODIGO")
+    query<-paste0("SELECT O.NHC,S.* FROM ",db["dbtables"]," S INNER JOIN ",db["dbcode"]," O ON O.",db["dbcode"],"=S.",db["dbcode"])
+  }
+  if (nrow(sqlQuery(conn, query) %>% filter(NHC %in% nhcs)) == 0){
+    return("No hay muestras de ningún paciente.")
+  }
   if (isFALSE(verb)){
-    sqlQuery(conn, "SELECT O.NHC,S.* 
-         FROM SAMPLES S 
-         INNER JOIN OVID O 
-         ON O.OVID=S.OVID") %>% filter(NHC %in% nhcs) %>% 
-    group_by(NHC,OVID) %>% summarise(Samples=length(samples), Names=paste0(samples, collapse = ";")) %>% merge(data.frame(NHC=nhcs),all=T)
+    sqlQuery(conn, query) %>% filter(NHC %in% nhcs) %>% 
+    group_by(NHC,db["dbcode"]) %>% summarise(Samples=length(UQ(rlang::sym(db["dbsamples"]))), Names=paste0(UQ(rlang::sym(db["dbsamples"])), collapse = ";")) %>% 
+      merge(data.frame(NHC=nhcs),all=T) %>% rename((!!db["dbcode"]):='db["dbcode"]')
   }else{
-    sqlQuery(conn, "SELECT O.NHC,S.* 
-         FROM SAMPLES S 
-         INNER JOIN OVID O 
-         ON O.OVID=S.OVID") %>% filter(NHC %in% nhcs)
+    sqlQuery(conn, query) %>% filter(NHC %in% nhcs)
   }
 }