Add API-Nodejs doc

docs/client/api-nodejs.md

@@ -0,0 +1,129 @@
+---
+template: overrides/blog.html
+---
+
+# NodeJS
+
+> [@croosdb/crossdb-nodejs](https://www.npmjs.com/package/@croosdb/crossdb-nodejs)
+
+## APIs List
+
+|          | API                                              | Description                                  |
+| -------- | ------------------------------------------------ | -------------------------------------------- |
+| new      | [**new**](#new) (`:memory:` \| `[path/]db_name`) | Open a connection for local DB direct access |
+| exec     | [**exec**](#exec) (`statement`)                  | Execute SQL statement                        |
+| begin    | [**begin**](#begin) ()                           | Begin transaction                            |
+| commit   | [**commit**](#commit) ()                         | Commit transaction                           |
+| rollback | [**rollback**](#rollback) ()                     | Rollback transaction                         |
+| close    | [**close**](#close) ()                           | Close a connection                           |
+| version  | [**version**](#version) ()                       | Get CrossDB version info                     |
+
+### new
+
+Open a connection and create/open a local Database.
+
+```javascript
+const CrossDB = require("@croosdb/crossdb-nodejs");
+
+const db = new CrossDB(":memory:");
+// or
+const db = new CrossDB("[path/]db_name");
+```
+
+- If path is :memory:, a memory database is created or opened, becoming the default database for this connection.
+- If path specifies [path/]db_name, a database at the given path is created or opened.
+- All databases opened are shared across all active connections.
+
+### exec
+
+Execute SQL statement and return result set.
+
+```javascript
+// Create tables if they do not already exist
+db.exec(
+  "CREATE TABLE IF NOT EXISTS student (id INT PRIMARY KEY, name CHAR(16), age INT, class CHAR(16), score FLOAT, info VARCHAR(255))"
+);
+// Clean (empty) a table
+db.exec("DELETE FROM student");
+// Insert sample data into the table
+db.exec(
+  "INSERT INTO student (id,name,age,class,score) VALUES (1,'jack',10,'3-1',90),(2,'tom',11,'2-5',91),(3,'jack',11,'1-6',92),(4,'rose',10,'4-2',90),(5,'tim',10,'3-1',95)"
+);
+// Query to select all records from the table
+
+let res = db.exec("SELECT * FROM student");
+res.forEach((element, i) => {
+  console.log(i, "Select all records: ", element);
+});
+// Execute multiple statements
+res = db.exec(
+  "SELECT COUNT(*) as Count FROM student; SELECT id, name, age FROM student WHERE id=2;SELECT MIN(score) as min, MAX(score) as max, SUM(score) as sum, AVG(score) as avg FROM student"
+);
+res.forEach((element, i) => {
+  console.log(i, "Multi-statement result: ", element);
+});
+```
+
+In SQL, the behavior of statements regarding result sets is as follows:
+
+- SELECT Statements: These retrieve data and return a result set comprising the selected rows.
+- Non-SELECT Statements: Statements like INSERT, UPDATE, and DELETE modify data and typically do not return a result set. Instead, they provide the number of rows affected.
+
+When executing multiple statements sequentially:
+
+- Multiple SELECT Statements: Each SELECT returns its own result set in the order of execution.
+- Mixed Statements: Only SELECT statements return result sets, each corresponding to its position in the sequence. Non-SELECT statements do not return result sets but indicate the number of rows affected.
+
+### begin
+
+Begin a transaction.
+
+```javascript
+begin();
+```
+
+### commit
+
+Commit a transaction.
+
+```javascript
+commit();
+```
+
+### rollback
+
+Rollback a transaction.
+
+```javascript
+rollback();
+```
+
+### close
+
+Close connection.
+
+```javascript
+close();
+```
+
+### version
+
+Get CrossDB version string.
+
+```javascript
+version();
+```
+
+Return this object:
+
+- "CroosDB": CroosDB version.
+- "Package": Node.js package version,
+- "Platform": Platform information
+
+```json
+{
+  "CroosDB": "0.11.0",
+  "Package": "1.4.1",
+  "Platform": "darwin"
+}
+```

mkdocs.yml

@@ -204,6 +204,7 @@ nav:
     - Client APIs:
       - client/api-c.md
       - client/api-python.md
+      - client/api-nodejs.md
     - SQL:
       - sql/statements.md
       - sql/data-types.md