diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index f5c3280..5c46bb5 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -5,7 +5,7 @@ Yii Framework 2 Change Log
 ------------------------
 
 - Bug #18323: Fix client validation of RadioList when there are disabled items (toir427)
-- Enh #18534: Added `prepareSearchQuery` property in `yii\rest\IndexAction` (programmis)
+- Enh #18534: Add `prepareSearchQuery` property in `yii\rest\IndexAction` (programmis)
 - Enh #18566: Throw the original exception when `yii\web\Controller::bindInjectedParams()` catches HttpException (pigochu)
 - Bug #18585: Fix `yii\validators\EmailValidator` to handle an edge case where `IDN` is enabled, but fails ascii conversion for valid email addresses (ihitbuttons)
 - Bug #18574: Fix `yii\web\DbSession` to use the correct db if strict mode is used (Mignar)
diff --git a/framework/caching/DbCache.php b/framework/caching/DbCache.php
index 1b82305..f45c0ad 100644
--- a/framework/caching/DbCache.php
+++ b/framework/caching/DbCache.php
@@ -297,9 +297,8 @@ class DbCache extends Cache
     }
 
     /**
-     * @return bool
-     *
-     * Checking Mssql: if field is varbinary - return true
+     * @return bool whether field is MSSQL varbinary
+     * @since 2.0.42
      */
     protected function isVarbinaryDataField()
     {
@@ -311,8 +310,8 @@ class DbCache extends Cache
     }
 
     /**
-     * @return string
-     * Returning `data` field name with converting for usage in MSSQL (if needs)
+     * @return string `data` field name converted for usage in MSSQL (if needed)
+     * @since 2.0.42
      */
     protected function getDataFieldName()
     {
@@ -320,10 +319,8 @@ class DbCache extends Cache
     }
 
     /**
-     * @param $value
-     * @return PdoValue
-     *
-     * Return PdoValue or direct $value for usage in MSSQL
+     * @return PdoValue PdoValue or direct $value for usage in MSSQL
+     * @since 2.0.42
      */
     protected function getDataFieldValue($value)
     {
diff --git a/framework/db/Connection.php b/framework/db/Connection.php
index c8fa416..9ecb213 100644
--- a/framework/db/Connection.php
+++ b/framework/db/Connection.php
@@ -429,7 +429,6 @@ class Connection extends Component
      * Is used to restore a QueryBuilder configuration after the connection close/open cycle.
      *
      * @see restoreQueryBuilderConfiguration()
-     * @since 2.0.42
      */
     private $_queryBuilderConfigurations = [];
 
@@ -892,8 +891,6 @@ class Connection extends Component
 
     /**
      * Restores custom QueryBuilder configuration after the connection close/open cycle
-     *
-     * @since 2.0.42
      */
     private function restoreQueryBuilderConfiguration()
     {
diff --git a/framework/db/mssql/ColumnSchemaBuilder.php b/framework/db/mssql/ColumnSchemaBuilder.php
index 35a8ac1..7188e45 100644
--- a/framework/db/mssql/ColumnSchemaBuilder.php
+++ b/framework/db/mssql/ColumnSchemaBuilder.php
@@ -36,7 +36,7 @@ class ColumnSchemaBuilder extends AbstractColumnSchemaBuilder
     }
 
     /**
-     * Changes default format string to MSSQL ALTER COMMAND
+     * Changes default format string to MSSQL ALTER COMMAND.
      */
     public function setAlterColumnFormat()
     {
@@ -45,7 +45,7 @@ class ColumnSchemaBuilder extends AbstractColumnSchemaBuilder
 
     /**
      * Getting the `Default` value for constraint
-     * @return string|Expression|null
+     * @return string|Expression|null default value of the column.
      */
     public function getDefaultValue()
     {
@@ -58,7 +58,7 @@ class ColumnSchemaBuilder extends AbstractColumnSchemaBuilder
 
     /**
      * Get the `Check` value for constraint
-     * @return string|null
+     * @return string|null the `CHECK` constraint for the column.
      */
     public function getCheckValue()
     {
@@ -66,7 +66,7 @@ class ColumnSchemaBuilder extends AbstractColumnSchemaBuilder
     }
 
     /**
-     * @return bool
+     * @return bool whether the column values should be unique. If this is `true`, a `UNIQUE` constraint will be added.
      */
     public function isUnique()
     {