diff --git a/connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MsSqlServerIntegrationSuite.scala b/connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MsSqlServerIntegrationSuite.scala
index 8bceb9506e850..273e8c35dd073 100644
--- a/connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MsSqlServerIntegrationSuite.scala
+++ b/connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MsSqlServerIntegrationSuite.scala
@@ -437,4 +437,12 @@ class MsSqlServerIntegrationSuite extends DockerJDBCIntegrationSuite {
       .load()
     assert(df.collect().toSet === expectedResult)
   }
+
+  test("SPARK-47938: Fix 'Cannot find data type BYTE' in SQL Server") {
+    spark.sql("select cast(1 as byte) as c0")
+      .write
+      .jdbc(jdbcUrl, "test_byte", new Properties)
+    val df = spark.read.jdbc(jdbcUrl, "test_byte", new Properties)
+    checkAnswer(df, Row(1.toShort))
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
index 862e99adc3b0d..1d05c0d7c24ed 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
@@ -136,6 +136,7 @@ private case class MsSqlServerDialect() extends JdbcDialect {
     case BinaryType => Some(JdbcType("VARBINARY(MAX)", java.sql.Types.VARBINARY))
     case ShortType if !SQLConf.get.legacyMsSqlServerNumericMappingEnabled =>
       Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
+    case ByteType => Some(JdbcType("SMALLINT", java.sql.Types.TINYINT))
     case _ => None
   }