Sequel 1.0.3

sequel

sequel is an expressive SQL query builder, with syntax that emulates writing actual SQL queries.

Basic Usage

SELECT

var sqlBuilder = new SqlBuilder()
  .Select("Id", "Salary")
  .From("dbo.Test");

var sql = sqlBuilder.ToSql(); // .ToString() also works

/*
SELECT Id, Salary FROM dbo.Test
*/

INSERT

var sqlBuilder = new SqlBuilder()
  .Insert("dbo.Test")
  .Columns("Name", "Salary")
  .Values("'John'", "50").Values("'Jane'", "100");

var sql = sqlBuilder.ToSql(); // .ToString() also works

/*
INSERT INTO dbo.Test (Name, Salary) VALUES ('John', 50), ('Jane', 100)
*/

UPDATE

var sqlBuilder = new SqlBuilder()
  .Update("dbo.Test")
  .Set("Salary = 100", "ManagerId = 2")
  .Where("EmployeeId = 1");

var sql = sqlBuilder.ToSql(); // .ToString() also works

/*
UPDATE dbo.Test SET Salary = 100, ManagerId = 2 WHERE EmployeeId = 1
*/

DELETE

var sqlBuilder = new SqlBuilder()
  .Delete()
  .From("dbo.Test")
  .Where("EmployeeId = 1");

var sql = sqlBuilder.ToSql(); // .ToString() also works

/*
DELETE FROM dbo.Test WHERE EmployeeId = 1
*/

Templating

sequel has built-in templates to support the actions listed above, but also supports custom templating for edge cases. To formulate the SQL string, sequel uses || delimiters surrounding the following keywords:

• ||select||
• ||from||
• ||join||
• ||where||
• ||groupby||
• ||having||
• ||orderby|
• ||insert||
• ||columns||
• ||values|
• ||update||
• ||set||
• ||delete||

To use SqlBuilder with a custom template, provide the template when constructing new SqlBuilder("YOUR CUSTOM TEMPLATE").

The default templates are as follows:

Select

||select|| ||from|| ||join|| ||where|| ||groupby|| ||having|| ||orderby||

Insert

||insert|| ||columns|| ||values||

Update

||update|| ||set|| ||where||

Delete

||delete|| ||from|| ||join|| ||where||

Usage with dapper.net

using(var conn = new SqlConnection("your connection string")
{
  var sqlBuilder = new SqlBuilder()
    .Select("Id", "Salary")
    .From("dbo.Test")
    .Where("Id", "@Id");

  var sql = sqlBuilder.ToSql(); // .ToString() also works 
  /*
  SELECT Id, Salary FROM dbo.Test WHERE Id = @Id
  */ 
    
  var result = conn.Query(sql, new { Id = 1 });
}