diff --git a/sql-statements/sql-statement-add-column.md b/sql-statements/sql-statement-add-column.md
index 2c67d1fc2cea0..f306ea74c4f00 100644
--- a/sql-statements/sql-statement-add-column.md
+++ b/sql-statements/sql-statement-add-column.md
@@ -31,7 +31,7 @@ ColumnOption
            | 'AUTO_INCREMENT'
            | 'PRIMARY'? 'KEY' ( 'CLUSTERED' | 'NONCLUSTERED' )? ( 'GLOBAL' | 'LOCAL' )?
            | 'UNIQUE' 'KEY'? ( 'GLOBAL' | 'LOCAL' )?
-           | 'DEFAULT' ( NowSymOptionFraction | SignedLiteral | NextValueForSequence )
+           | 'DEFAULT' DefaultValueExpr
            | 'SERIAL' 'DEFAULT' 'VALUE'
            | 'ON' 'UPDATE' NowSymOptionFraction
            | 'COMMENT' stringLit
@@ -42,6 +42,13 @@ ColumnOption
            | 'COLUMN_FORMAT' ColumnFormat
            | 'STORAGE' StorageMedia
            | 'AUTO_RANDOM' ( '(' LengthNum ')' )?
+
+DefaultValueExpr ::=
+    NowSymOptionFractionParentheses
+|   SignedLiteral
+|   NextValueForSequenceParentheses
+|   BuiltinFunction
+|   '(' SignedLiteral ')'
 ```
 
 ## Examples
diff --git a/sql-statements/sql-statement-change-column.md b/sql-statements/sql-statement-change-column.md
index 9c5dc956004aa..b7536d8eb7b99 100644
--- a/sql-statements/sql-statement-change-column.md
+++ b/sql-statements/sql-statement-change-column.md
@@ -34,7 +34,7 @@ ColumnOption
            | 'AUTO_INCREMENT'
            | 'PRIMARY'? 'KEY' ( 'CLUSTERED' | 'NONCLUSTERED' )?
            | 'UNIQUE' 'KEY'?
-           | 'DEFAULT' ( NowSymOptionFraction | SignedLiteral | NextValueForSequence )
+           | 'DEFAULT' DefaultValueExpr
            | 'SERIAL' 'DEFAULT' 'VALUE'
            | 'ON' 'UPDATE' NowSymOptionFraction
            | 'COMMENT' stringLit
@@ -48,6 +48,13 @@ ColumnOption
 
 ColumnName ::=
     Identifier ( '.' Identifier ( '.' Identifier )? )?
+
+DefaultValueExpr ::=
+    NowSymOptionFractionParentheses
+|   SignedLiteral
+|   NextValueForSequenceParentheses
+|   BuiltinFunction
+|   '(' SignedLiteral ')'
 ```
 
 ## Examples
diff --git a/sql-statements/sql-statement-create-table.md b/sql-statements/sql-statement-create-table.md
index 35b506ecb57d0..7a2faa78cc15f 100644
--- a/sql-statements/sql-statement-create-table.md
+++ b/sql-statements/sql-statement-create-table.md
@@ -132,6 +132,7 @@ DefaultValueExpr ::=
 |   SignedLiteral
 |   NextValueForSequenceParentheses
 |   BuiltinFunction
+|   '(' SignedLiteral ')'
 
 BuiltinFunction ::=
     '(' BuiltinFunction ')'
diff --git a/sql-statements/sql-statement-modify-column.md b/sql-statements/sql-statement-modify-column.md
index 545e81619b78d..3f0d87dec5b5a 100644
--- a/sql-statements/sql-statement-modify-column.md
+++ b/sql-statements/sql-statement-modify-column.md
@@ -34,7 +34,7 @@ ColumnOption
            | 'AUTO_INCREMENT'
            | 'PRIMARY'? 'KEY' ( 'CLUSTERED' | 'NONCLUSTERED' )?
            | 'UNIQUE' 'KEY'?
-           | 'DEFAULT' ( NowSymOptionFraction | SignedLiteral | NextValueForSequence )
+           | 'DEFAULT' DefaultValueExpr
            | 'SERIAL' 'DEFAULT' 'VALUE'
            | 'ON' 'UPDATE' NowSymOptionFraction
            | 'COMMENT' stringLit
@@ -48,6 +48,13 @@ ColumnOption
 
 ColumnName ::=
     Identifier ( '.' Identifier ( '.' Identifier )? )?
+
+DefaultValueExpr ::=
+    NowSymOptionFractionParentheses
+|   SignedLiteral
+|   NextValueForSequenceParentheses
+|   BuiltinFunction
+|   '(' SignedLiteral ')'
 ```
 
 ## Examples