diff --git a/src/Carbunql/Analysis/Parser/FromArgumentParser.cs b/src/Carbunql/Analysis/Parser/FromArgumentParser.cs
index 25e99e2a..1c77a549 100644
--- a/src/Carbunql/Analysis/Parser/FromArgumentParser.cs
+++ b/src/Carbunql/Analysis/Parser/FromArgumentParser.cs
@@ -14,7 +14,7 @@ public static class FromArgumentParser
     /// <param name="unit">The unit value.</param>
     /// <param name="argument">The SQL text containing the FROM argument.</param>
     /// <returns>The parsed FROM argument.</returns>
-    public static FromArgument Parse(ValueBase unit, string argument)
+    public static FromArgument Parse(string unit, string argument)
     {
         var r = new SqlTokenReader(argument);
         return Parse(unit, r);
@@ -26,7 +26,7 @@ public static FromArgument Parse(ValueBase unit, string argument)
     /// <param name="unit">The unit value.</param>
     /// <param name="r">The token reader.</param>
     /// <returns>The parsed FROM argument.</returns>
-    public static FromArgument Parse(ValueBase unit, ITokenReader r)
+    public static FromArgument Parse(string unit, ITokenReader r)
     {
         var value = ValueParser.Parse(r);
         return new FromArgument(unit, value);
diff --git a/src/Carbunql/Analysis/Parser/ValueCollectionParser.cs b/src/Carbunql/Analysis/Parser/ValueCollectionParser.cs
index 376f7c2e..89b81885 100644
--- a/src/Carbunql/Analysis/Parser/ValueCollectionParser.cs
+++ b/src/Carbunql/Analysis/Parser/ValueCollectionParser.cs
@@ -58,7 +58,7 @@ internal static IEnumerable<ValueBase> ReadValues(ITokenReader r)
 
             if (r.ReadOrDefault("from") != null)
             {
-                yield return FromArgumentParser.Parse(v, r);
+                yield return FromArgumentParser.Parse(v.ToText(), r);
             }
             else if (r.ReadOrDefault("as") != null)
             {
diff --git a/src/Carbunql/Carbunql.csproj b/src/Carbunql/Carbunql.csproj
index 87f11871..ef52a863 100644
--- a/src/Carbunql/Carbunql.csproj
+++ b/src/Carbunql/Carbunql.csproj
@@ -8,7 +8,7 @@
 		<Title></Title>
 		<Copyright>mk3008net</Copyright>
 		<Description>Carbunql is an advanced Raw SQL editing library.</Description>
-		<Version>0.8.13</Version>
+		<Version>0.8.13.1</Version>
 		<Authors>mk3008net</Authors>
 		<PackageProjectUrl>https://github.com/mk3008/Carbunql</PackageProjectUrl>
 		<PackageReadmeFile>README.md</PackageReadmeFile>
diff --git a/src/Carbunql/Values/FromArgument.cs b/src/Carbunql/Values/FromArgument.cs
index 2856b4f6..61ffdfa0 100644
--- a/src/Carbunql/Values/FromArgument.cs
+++ b/src/Carbunql/Values/FromArgument.cs
@@ -22,7 +22,7 @@ public FromArgument()
     /// </summary>
     /// <param name="unit">The unit value.</param>
     /// <param name="value">The value.</param>
-    public FromArgument(ValueBase unit, ValueBase value)
+    public FromArgument(string unit, ValueBase value)
     {
         Unit = unit;
         Value = value;
@@ -31,7 +31,7 @@ public FromArgument(ValueBase unit, ValueBase value)
     /// <summary>
     /// Gets or sets the unit value.
     /// </summary>
-    public ValueBase Unit { get; init; }
+    public string Unit { get; init; }
 
     /// <summary>
     /// Gets or sets the value.
@@ -41,10 +41,6 @@ public FromArgument(ValueBase unit, ValueBase value)
     /// <inheritdoc/>
     protected override IEnumerable<SelectQuery> GetInternalQueriesCore()
     {
-        foreach (var item in Unit.GetInternalQueries())
-        {
-            yield return item;
-        }
         foreach (var item in Value.GetInternalQueries())
         {
             yield return item;
@@ -54,7 +50,9 @@ protected override IEnumerable<SelectQuery> GetInternalQueriesCore()
     /// <inheritdoc/>
     public override IEnumerable<Token> GetCurrentTokens(Token? parent)
     {
-        foreach (var item in Unit.GetTokens(parent)) yield return item;
+        if (string.IsNullOrEmpty(Unit)) throw new InvalidProgramException();
+
+        yield return Token.Reserved(this, parent, Unit);
         yield return Token.Reserved(this, parent, "from");
         foreach (var item in Value.GetTokens(parent)) yield return item;
     }
@@ -62,10 +60,6 @@ public override IEnumerable<Token> GetCurrentTokens(Token? parent)
     /// <inheritdoc/>
     protected override IEnumerable<QueryParameter> GetParametersCore()
     {
-        foreach (var item in Unit.GetParameters())
-        {
-            yield return item;
-        }
         foreach (var item in Value.GetParameters())
         {
             yield return item;
@@ -75,10 +69,6 @@ protected override IEnumerable<QueryParameter> GetParametersCore()
     /// <inheritdoc/>
     protected override IEnumerable<PhysicalTable> GetPhysicalTablesCore()
     {
-        foreach (var item in Unit.GetPhysicalTables())
-        {
-            yield return item;
-        }
         foreach (var item in Value.GetPhysicalTables())
         {
             yield return item;
@@ -88,10 +78,6 @@ protected override IEnumerable<PhysicalTable> GetPhysicalTablesCore()
     /// <inheritdoc/>
     protected override IEnumerable<CommonTable> GetCommonTablesCore()
     {
-        foreach (var item in Unit.GetCommonTables())
-        {
-            yield return item;
-        }
         foreach (var item in Value.GetCommonTables())
         {
             yield return item;
@@ -100,10 +86,6 @@ protected override IEnumerable<CommonTable> GetCommonTablesCore()
 
     internal override IEnumerable<ColumnValue> GetColumnsCore()
     {
-        foreach (var item in Unit.GetColumns())
-        {
-            yield return item;
-        }
         foreach (var item in Value.GetColumns())
         {
             yield return item;
@@ -114,11 +96,6 @@ public override IEnumerable<ValueBase> GetValues()
     {
         yield return this;
 
-        foreach (var item in Unit.GetValues())
-        {
-            yield return item;
-        }
-
         foreach (var item in Value.GetValues())
         {
             yield return item;
diff --git a/test/Carbunql.Fluent.Test/FluentWhereTest.cs b/test/Carbunql.Fluent.Test/FluentWhereTest.cs
new file mode 100644
index 00000000..0ac62c4e
--- /dev/null
+++ b/test/Carbunql.Fluent.Test/FluentWhereTest.cs
@@ -0,0 +1,80 @@
+using Xunit.Abstractions;
+
+namespace Carbunql.Fluent.Test;
+
+public class FluentWhereTest
+{
+    private readonly QueryCommandMonitor Monitor;
+
+    public FluentWhereTest(ITestOutputHelper output)
+    {
+        Monitor = new QueryCommandMonitor(output);
+    }
+
+    [Fact]
+    public void EqualTest()
+    {
+        var sq = new SelectQuery("""
+            select
+                a.id
+                , a.value
+            from
+                table_a a
+            """)
+            .Equal("id", 1);
+        ;
+
+        Monitor.Log(sq);
+
+        var expect = """
+            SELECT
+                a.id,
+                a.value
+            FROM
+                table_a AS a
+            WHERE
+                a.id = 1
+            """;
+
+        Assert.Equal(expect, sq.ToText());
+    }
+
+    [Fact]
+    public void EqualTest_ExtractYear()
+    {
+        var sq = new SelectQuery("""
+            SELECT 
+                o.order_id,
+                c.customer_name,
+                o.order_date,
+                EXTRACT(YEAR FROM o.order_date) AS order_year,
+                EXTRACT(MONTH FROM o.order_date) AS order_month,
+                o.amount
+            FROM 
+                orders o
+            JOIN 
+                customers c ON o.customer_id = c.customer_id
+            """)
+            .Equal("order_year", 1);
+        ;
+
+        Monitor.Log(sq);
+
+        var expect = """
+            SELECT
+                o.order_id,
+                c.customer_name,
+                o.order_date,
+                EXTRACT(YEAR FROM o.order_date) AS order_year,
+                EXTRACT(MONTH FROM o.order_date) AS order_month,
+                o.amount
+            FROM
+                orders AS o
+                JOIN customers AS c ON o.customer_id = c.customer_id
+            WHERE
+                EXTRACT(YEAR FROM o.order_date) = 1
+            """;
+
+        Assert.Equal(expect, sq.ToText());
+    }
+}
\ No newline at end of file