added documentation and removed some unused methods

Author: ppaska

README.md

@@ -1,6 +1,19 @@
 # sql-data-api-client-js
 SQL Data Api client for Javascript
 
+ - [Install](#install)
+ - [Set Base Url](#set-base-url)
+ - [Authenticate](#authenticate)
+ - [Query Data From Sql Database](#query-tables-or-views)
+ - [Save Data Into Sql Database](#saving-data)
+    * [Save Array Of Object (Upsert(Merge) / Append / BulkInsert) ](#save-array-of-objects)
+    * [Save With AutoId](#save-with-auto-id)
+    * [Update](#update)
+    * [Delete Array](#delete)
+    * [Delete From](#delete-from)
+ - [Sql Execute](#sql-execute)
+ - [License](#license)
+
 ## Install
 
 > npm install sql-data-api
@@ -16,11 +29,13 @@ setBaseUrl('https://api.worksheet.systems');
 
 ```
 
-## Authentication
+## Authenticate
+
+All sql-api operations should be authenticated unless public access allowed. Check Worksheet Systems Access Control model
 
 There are two types of authentication.
 
-1. you can set user name and password (use your Worksheet Systems account)
+1. you can set user name and password (use your Worksheet Systems account) (least preferable as you have to hardcode password)
 
 ```js
 import { authenticate } from 'sql-data-api';
@@ -37,7 +52,7 @@ import { setUserAccessToken } from 'sql-data-api';
 setUserAccessToken('$ACCESS_TOKEN')
 ```
 
-## Query Data
+## Query tables or views
 
 ```js
 
@@ -57,9 +72,24 @@ export interface SqlReadQueryInfo {
 }
 
 ```
-### Query Usage
 
-#### A simple queries
+SQL Data api allows you to safely and securely query data from SQL tables/views. And you can use SQL functions, rename SQL columns, aggregate (groupBy) and even join tables
+
+There are several ways you can define a query to the SQL Database. But, eventually it comes down to the few properties you have to specify:
+
+ - **tableName** - name of SQL table or view. Also, you can specify alias e.g. `myTable t`, then you have to list your fields as `t.Field1` etc
+ - **fields** - a list of fields to select. If `fields` property is not provided, then all table fields will be returned. Kind of `select * from [tableName]`. Also, there are several other scenarios:
+   * rename fields e.g. `Country CustomerCountry` or `cast(TransactionTime as Date) TransactionDate`
+   * use SQL Functions e.g. `concat(FirstName, ' ', LastName) FullName`
+   * aggregate (group by): `groupBy|Country, groupBy|City, sum(revenue) Revenue, count(*) Count`
+- **filter** - defines a filter expression e.g. `country = 'uk' and city = 'London'` or you can use parameters and have filter as `country = @country AND city = @city` and provide parameters as an object`{country: 'UK', city: 'London'}`. And you can use SQL functions as well:  e.g.: `cast(TransactionTime as Date) = '2021-11-21'`
+- **orderBy** - define a columns to sort e.g.: `OrderDate DESC, OrderId ASC
+- **top**` - specify the number of records to return.
+- **join** - combine rows from two or more tables, based on a related column between them. You can define array `[JoinType, TableToJoin, JoinCondition]` or:  `['InnerJoin', 'Customers c', 'c.CustomerId = t.CustomerId']`
+
+### Query Examples
+
+**A simple queries**
 
 ```js
 import { sqlDataApi } from 'sql-data-api';
@@ -100,33 +130,164 @@ const itwms = await sqlDataApi('connectionName')
 ```
 #### Aggregated query
 
-Add `groupBy|` prefix to the field and use aggregation functions e.g: sum, avg, count ...
+Add `groupBy|` prefix to the field you want to `group by` and use aggregation functions e.g: sum, avg, count ...
 
 ```js
-
 const aggData = await sqlDataApi('connectionName')
     .query('someTableOrViewName', {
         fields: 'groupBy|country, sum(revenue) revenue'
     });
 
 ```
 
-
-## Save a array of items 
+or with the same result
 
 ```js
-save(tableName: string, items: ScalarObject[], itemsToDeleteOrSaveOptions?: Record<string, unknown>[] | SqlSaveOptions, saveOptions?: SqlSaveOptions): Promise<SqlSaveStatus>;
+const aggData = await sqlDataApi('connectionName')
+    .query(
+        'someTableOrViewName',
+        'groupBy|country, sum(revenue) revenue'
+    );
+```
+
+
+## Saving Data
 
+### Save array of objects
+
+Upsert(Merge), Append or BulkInsert an array of items into the table based on save options
+If third parameter is an array, it will delete records from the table. Only Key Fields must be provided
+
+```js
+save(
+    tableName: string, 
+    items: ScalarObject[], 
+    itemsToDeleteOrSaveOptions?: Record<string, unknown>[] | SqlSaveOptions, 
+    saveOptions?: SqlSaveOptions
+): Promise<SqlSaveStatus>;
+
+/**
+ * Sql Save operation config
+ */
 export interface SqlSaveOptions {
-    method: "Merge" | "Append" | "BulkInsert";
-    batchSize?: number;
-    primaryKeys?: string[];
-    batchProgressFunc?: (processedCount: number, status: SqlSaveStatus) => void;
+  /**
+   * save types
+   */
+  method: "Merge" | "Append" | "BulkInsert";
+
+  /**
+   * a batch size for optimization point
+   */
+  batchSize?: number;
+  /**
+   * Define a primary key that should be used. Normally primary keys are taken from the table,
+   * Use this property only if you want to upsert (merge) data on some other fields 
+   */
+  primaryKeys?: string[];
+
+  /**
+   * Report progress on batch saving
+   */
+  batchProgressFunc?: (processedCount: number, status: SqlSaveStatus) => void;
 }
+```
+
+**a simple save (upsert) example**
+
+```js
+sqlDataApi('someConnection')
+    .save('someTable', arrayOfItems)
+```
+
 
-saveWithAutoId(tableName: string, item: ScalarObject): Promise<number>;
+### Save With Auto Id
 
-sqlExecute(sql: string, params?: ScalarObject): Promise<ScalarObject[] | unknown>;
+Saves a single record into the database and returns autogenerated ID field value.
+SQL Table should have Auto Indentity on one of the fields
+
+```js
+const person = {
+    name: 'Adam'
+}
+
+// table peopleTable should have Identity column
+person.id = await sqlDataApi('someConnection')
+    .saveWithAutoId('peopleTable', person);
+
+console.log(person)
+```
+
+### Update
+
+Updates data in the table based on filter parameter and returns number of rows affected
+
+```js
+  /**
+   * Updates data in the table based on filter parameters
+   * @returns Number of rows affected
+   */
+  async updateData(
+    tableName: string,
+    updateData: Record<string, ScalarType>,
+    filter?: string,
+    filterParams?: Record<string, ScalarType>
+  ): Promise<number> 
+```
+
+### Delete
+
+Deletes rows from the table based on a primary keys. Only key fields have to be provided
+
+```js
+  /**
+   * Deletes rows from the table. Only key fields have to be provided
+   * @returns success
+   */
+  async delete(
+    tableName: string,
+    items: Record<string, ScalarType>[]
+  ): Promise<boolean>
+```
+
+
+### Delete From
+
+Delete records from the table based on filter criteria
+
+```js
+  /**
+   * Delete records from the table based on filter criteria
+   */
+  async deleteFrom(
+    tableName: string,
+    filter?: string,
+    filterParams?: Record<string, ScalarType>
+  ): Promise<number> 
+```
+
+## SQL Execute
+
+Executes `sql` script in the server and returns either raw table or array of objects 
+
+```js
+  /**
+   * Executes a SQL Query or stored procedure with parameters
+   * @returns Raw result (SqlQueryResponse) with a table in it
+   */
+  async sqlExecuteRaw(
+    sql: string,
+    params?: ScalarObject,
+    paramDirections?: Record<string, string>
+  ): Promise<SqlQueryResponse>
+
+  /**
+   * Executes a SQL Query or stored procedure with parameters
+   * @returns result as a list of arrays 
+   */
+  async sqlExecute(
+    sql: string,
+    params?: ScalarObject
+  ): Promise<ScalarObject[] | unknown> 
 
 ```
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sql-data-api",
-  "version": "0.2.35",
-  "description": "Sql Data Api",
+  "version": "0.3.1",
+  "description": "Sql Data Api client for Javascript",
   "keywords": [
     "sql",
     "api"
@@ -36,7 +36,7 @@
   "homepage": "https://github.com/FalconSoft/sql-data-api-client-js",
   "dependencies": {
     "axios": "^0.21.1",
-    "datapipe-js": "^0.3.16"
+    "datapipe-js": "^0.3.19"
   },
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "^4.8.2",