Update 2101-test.md

learnEcl/2101-test.md

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-## TEST
+---
+title: TEST
+slug: test
+---
+
+# ECL
+
+ECL - Enterprise Control Language is designed to handle and manipulate immense datasets which makes it a prefect language to solve big data problems. ECL can be used for both ETL (Extract, Transform, and Load) and querying data. ECL is a declarative language which allows processing big data without the need of programmer being involved with details and in-depth of imperative decisions.
+
+## ECL vs SQL
+
+ECL and SQL can both be used to query a relational database. Following tables displays similar features between ECL and SQL.
+
+| SQL                                                                                                             | ECL                                                                                                              |
+| --------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
+| Declarative Language                                                                                            | Declarative Language                                                                                             |
+| Database Server                                                                                                 | Thor Cluster or Roxie Cluster                                                                                    |
+| A SQL Table                                                                                                     | An ECL Logical File                                                                                              |
+| A SQL Editor                                                                                                    | VSCode Editor or ECL Cloud IDE                                                                                   |
+| A SQL File                                                                                                      | A ECL File                                                                                                       |
+| Executing SQL means submitting the written SQL to the Database Server which in turn compiles it and executes it | Executing ECL means submitting the written ECL to a Thor or Roxie cluster which in turn compiles and executes it |
+| SQL Execution History/Logs                                                                                      | ECL Workunits Database & ECL Watch Workunits View                                                                |
+
+## Language Highlights
+
+- ECL is not case sensitive language, but it is recommended to use uppercase for reserved words
+- White spaces are ignored, but it is strongly recommended to use white space for clarity and readability
+- Declarative Programming Language, which means you specifies what needs to be done rather than how to do it
+- Source-to-source compiler
+- ECL code translated to C++ that is compiled to shared libraries and executed within a custom frame-work
+
+Please refer [ECL syntax](./syntax.md) to learn about ECL standards. Or,
+[jump right into coding](./output.md) and skip all the introductions.