diff --git a/src/common/error/src/format.rs b/src/common/error/src/format.rs
index 4113621cb0..87d8171ce0 100644
--- a/src/common/error/src/format.rs
+++ b/src/common/error/src/format.rs
@@ -34,7 +34,7 @@ impl<'a, E: ErrorExt + ?Sized> fmt::Debug for DebugFormat<'a, E> {
             write!(f, " Caused by: {:?}", source)?;
         }
         if let Some(backtrace) = self.0.backtrace_opt() {
-            // Add a newline to seperate causes and backtrace.
+            // Add a newline to separate causes and backtrace.
             write!(f, "\nBacktrace:\n{}", backtrace)?;
         }
 
diff --git a/src/servers/src/prometheus.rs b/src/servers/src/prometheus.rs
index 7e18b1d29a..48045b066e 100644
--- a/src/servers/src/prometheus.rs
+++ b/src/servers/src/prometheus.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! promethues protcol supportings
+//! prometheus protocol supportings
 use std::cmp::Ordering;
 use std::collections::{BTreeMap, HashMap};
 use std::hash::{Hash, Hasher};
@@ -77,7 +77,7 @@ pub fn query_to_sql(db: &str, q: &Query) -> Result<(String, String)> {
         let value = &m.value;
         let m_type =
             MatcherType::from_i32(m.r#type).context(error::InvalidPromRemoteRequestSnafu {
-                msg: format!("invaid LabelMatcher type: {}", m.r#type),
+                msg: format!("invalid LabelMatcher type: {}", m.r#type),
             })?;
 
         match m_type {
@@ -87,11 +87,11 @@ pub fn query_to_sql(db: &str, q: &Query) -> Result<(String, String)> {
             MatcherType::Neq => {
                 conditions.push(format!("{}!='{}'", name, value));
             }
-            // Case senstive regexp match
+            // Case sensitive regexp match
             MatcherType::Re => {
                 conditions.push(format!("{}~'{}'", name, value));
             }
-            // Case senstive regexp not match
+            // Case sensitive regexp not match
             MatcherType::Nre => {
                 conditions.push(format!("{}!~'{}'", name, value));
             }
diff --git a/src/sql/src/parser.rs b/src/sql/src/parser.rs
index 796f9816af..a9103de5c4 100644
--- a/src/sql/src/parser.rs
+++ b/src/sql/src/parser.rs
@@ -158,7 +158,7 @@ impl<'a> ParserContext<'a> {
                 }));
             }
 
-            // SHOW TABLES [in | FROM] [DATABSE]
+            // SHOW TABLES [in | FROM] [DATABASE]
             Token::Word(w) => match w.keyword {
                 Keyword::IN | Keyword::FROM => {
                     self.parser.next_token();