diff --git a/backup.sh b/backup.sh
index aaa2f8b..afe9b88 100755
--- a/backup.sh
+++ b/backup.sh
@@ -477,9 +477,9 @@ export logFile="$logFile"
 
 ### Create sqlDump temporary directory and sqlDumpFilenames
 sqlDumpDir=$( mktemp -d )
-sqlDump_ccnet-db="backup-$(date +%Y%m%d_%H%M%S)_ccnet-db.sql"
-sqlDump_seafile-db="backup-$(date +%Y%m%d_%H%M%S)_seafile-db.sql"
-sqlDump_seahub-db="backup-$(date +%Y%m%d_%H%M%S)_seahub-db.sql"
+sqlDump_ccnet="backup-$(date +%Y%m%d_%H%M%S)_ccnet-db.sql"
+sqlDump_seafile="backup-$(date +%Y%m%d_%H%M%S)_seafile-db.sql"
+sqlDump_seahub="backup-$(date +%Y%m%d_%H%M%S)_seahub-db.sql"
 echo -e "${info}[$(stamp)] -- [INFO] mySQL dump files will be temporarily" \
     "stored at: ${lit}${sqlDumpDir}/${sqlDumpFile}${normal}" >> "$logFile"
 
@@ -557,13 +557,20 @@ mapfile -t sqlParams < "$sqlDetails"
 
 
 ### Dump SQL
-echo -e "${op}[$(stamp)] Dumping Seafile SQL database...${normal}" >> "$logFile"
-mysqldump --single-transaction -h"${sqlParams[0]}" -u"${sqlParams[1]}" \
-    -p"${sqlParams[2]}" "${sqlParams[3]}" > "${sqlDumpDir}/${sqlDumpFile}" \
-    2>> "$logFile"
+echo -e "${op}[$(stamp)] Dumping Seafile SQL databases...${normal}" \
+    >> "$logFile"
+mysqldump -h"${sqlParams[0]}" -u"${sqlParams[1]}" -p"${sqlParams[2]}" --opt \
+    ccnet-db > "${sqlDumpDir}/${sqlDump_ccnet}" 2>> "$logFile"
+dumpResult_ccnet=$?
+mysqldump -h"${sqlParams[0]}" -u"${sqlParams[1]}" -p"${sqlParams[2]}" --opt \
+    seafile-db > "${sqlDumpDir}/${sqlDump_seafile}" 2>> "$logFile"
+dumpResult_seafile=$?
+mysqldump -h"${sqlParams[0]}" -u"${sqlParams[1]}" -p"${sqlParams[2]}" --opt \
+    seahub-db > "${sqlDumpDir}/${sqlDump_seahub}" 2>> "$logFile"
+dumpResult_seahub=$?
 # verify
-dumpResult="$?"
-if [ "$dumpResult" = "0" ]; then
+if [ "$dumpResult_ccnet" -eq 0 ] && [ "$dumpResult_seafile" -eq 0 ] && \
+    [ "$dumpResult_seahub" -eq 0 ]; then
     echo -e "${ok}[$(stamp)] -- [SUCCESS] SQL dumped successfully --${normal}" \
         >> "$logFile"
 else