diff --git a/src/languages/sql.js b/src/languages/sql.js
index 1db7380285..c84df31993 100644
--- a/src/languages/sql.js
+++ b/src/languages/sql.js
@@ -148,6 +148,8 @@ export default function(hljs) {
     "collect",
     "column",
     "commit",
+    "concat",
+    "concat_ws",
     "condition",
     "connect",
     "constraint",
@@ -182,6 +184,10 @@ export default function(hljs) {
     "cursor",
     "cycle",
     "date",
+    "date_add",
+    "date_format",
+    "date_sub",
+    "datediff",
     "day",
     "deallocate",
     "dec",
@@ -274,8 +280,11 @@ export default function(hljs) {
     "lead",
     "leading",
     "left",
+    "len',
+    'length",
     "like",
     "like_regex",
+    "limit",
     "listagg",
     "ln",
     "local",
@@ -408,6 +417,7 @@ export default function(hljs) {
     "stddev_samp",
     "submultiset",
     "subset",
+    "substr",
     "substring",
     "substring_regex",
     "succeeds",
@@ -423,6 +433,7 @@ export default function(hljs) {
     "then",
     "time",
     "timestamp",
+    "timestampdiff",
     "timezone_hour",
     "timezone_minute",
     "to",