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C# SqlWriter.WriteUnion方法代码示例

本文整理汇总了C#中SqlWriter.WriteUnion方法的典型用法代码示例。如果您正苦于以下问题:C# SqlWriter.WriteUnion方法的具体用法?C# SqlWriter.WriteUnion怎么用?C# SqlWriter.WriteUnion使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在SqlWriter的用法示例。


在下文中一共展示了SqlWriter.WriteUnion方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: WriteUnion_WhenInvalidState_ThrowsInvalidOperation

 public void WriteUnion_WhenInvalidState_ThrowsInvalidOperation()
 {
     StringBuilder builder = new StringBuilder();
     using (SqlWriter writer = new SqlWriter(builder))
     {
         writer.WriteStartUpdate();
         Assert.AreEqual(SqlWriterState.StartUpdate, writer.WriteState);
         AssertEx.Throws<InvalidOperationException>(() => writer.WriteUnion());
     }
 }
开发者ID:WouterDemuynck,项目名称:popsql,代码行数:10,代码来源:SqlWriterUnionTests.cs

示例2: WriteUnion_WhenSelectWithJoin_WritesUnionStatement

        public void WriteUnion_WhenSelectWithJoin_WritesUnionStatement()
        {
            StringBuilder builder = new StringBuilder();
            using (SqlWriter writer = new SqlWriter(builder))
            {
                writer.WriteStartSelect();
                writer.WriteColumn("u", "Id", null);
                writer.WriteColumn("u", "Name", null);
                writer.WriteColumn("p", "Age", null);
                writer.WriteStartFrom();
                writer.WriteTable("Users", "u");
                writer.WriteStartJoin(SqlJoinType.Inner);
                writer.WriteTable("Profiles", "p");
                writer.WriteStartOn();
                writer.WriteColumn("u", "Id", null);
                writer.WriteOperator(SqlBinaryOperator.Equal);
                writer.WriteColumn("p", "UserId", null);
                //writer.WriteStartWhere();
                //writer.WriteColumn("u", "Age", null);
                //writer.WriteOperator(SqlBinaryOperator.LessThanOrEqual);
                //writer.WriteValue(18);
                writer.WriteEndSelect();

                Assert.AreEqual(SqlWriterState.EndSelect, writer.WriteState);
                writer.WriteUnion();
                Assert.AreEqual(SqlWriterState.Union, writer.WriteState);

                writer.WriteStartSelect();
                writer.WriteColumn("u", "Id", null);
                writer.WriteColumn("u", "Name", null);
                writer.WriteColumn("p", "Age", null);
                writer.WriteStartFrom();
                writer.WriteTable("Users", "u");
                writer.WriteStartJoin(SqlJoinType.Inner);
                writer.WriteTable("Profiles", "p");
                writer.WriteStartOn();
                writer.WriteColumn("u", "Id", null);
                writer.WriteOperator(SqlBinaryOperator.Equal);
                writer.WriteColumn("p", "UserId", null);
                writer.WriteStartWhere();
                writer.WriteColumn("p", "Age", null);
                writer.WriteOperator(SqlBinaryOperator.GreaterThanOrEqual);
                writer.WriteValue(30);
                writer.WriteEndSelect();
            }

            Assert.AreEqual("SELECT [u].[Id], [u].[Name], [p].[Age] FROM [Users] [u] INNER JOIN [Profiles] [p] ON ([u].[Id] = [p].[UserId]) UNION SELECT [u].[Id], [u].[Name], [p].[Age] FROM [Users] [u] INNER JOIN [Profiles] [p] ON ([u].[Id] = [p].[UserId]) WHERE ([p].[Age] >= 30)", builder.ToString());
        }
开发者ID:WouterDemuynck,项目名称:popsql,代码行数:48,代码来源:SqlWriterUnionTests.cs

示例3: WriteUnion_WhenSelect_WritesUnionStatement

        public void WriteUnion_WhenSelect_WritesUnionStatement()
        {
            StringBuilder builder = new StringBuilder();
            using (SqlWriter writer = new SqlWriter(builder))
            {
                writer.WriteStartSelect();
                writer.WriteColumn("u", "Id", null);
                writer.WriteColumn("u", "Name", null);
                writer.WriteStartFrom();
                writer.WriteTable("Users", "u");
                writer.WriteEndSelect();

                Assert.AreEqual(SqlWriterState.EndSelect, writer.WriteState);
                writer.WriteUnion();
                Assert.AreEqual(SqlWriterState.Union, writer.WriteState);

                writer.WriteStartSelect();
                writer.WriteColumn("p", "Id", null);
                writer.WriteColumn("p", "Name", null);
                writer.WriteStartFrom();
                writer.WriteTable("Profiles", "p");
                writer.WriteEndSelect();
            }

            Assert.AreEqual("SELECT [u].[Id], [u].[Name] FROM [Users] [u] UNION SELECT [p].[Id], [p].[Name] FROM [Profiles] [p]", builder.ToString());
        }
开发者ID:WouterDemuynck,项目名称:popsql,代码行数:26,代码来源:SqlWriterUnionTests.cs


注:本文中的SqlWriter.WriteUnion方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。