diff --git a/packages/components/nodes/agents/ConversationalRetrievalAgent/ConversationalRetrievalAgent.ts b/packages/components/nodes/agents/ConversationalRetrievalAgent/ConversationalRetrievalAgent.ts
index ed39fbc8..c0cef052 100644
--- a/packages/components/nodes/agents/ConversationalRetrievalAgent/ConversationalRetrievalAgent.ts
+++ b/packages/components/nodes/agents/ConversationalRetrievalAgent/ConversationalRetrievalAgent.ts
@@ -5,6 +5,8 @@ import { flatten } from 'lodash'
 import { BaseChatMemory } from 'langchain/memory'
 import { ConsoleCallbackHandler, CustomChainHandler } from '../../../src/handler'
 
+const defaultMessage = `Do your best to answer the questions. Feel free to use any tools available to look up relevant information, only if necessary.`
+
 class ConversationalRetrievalAgent_Agents implements INode {
     label: string
     name: string
@@ -46,6 +48,7 @@ class ConversationalRetrievalAgent_Agents implements INode {
                 label: 'System Message',
                 name: 'systemMessage',
                 type: 'string',
+                default: defaultMessage,
                 rows: 4,
                 optional: true,
                 additionalParams: true
@@ -65,7 +68,7 @@ class ConversationalRetrievalAgent_Agents implements INode {
             agentType: 'openai-functions',
             verbose: process.env.DEBUG === 'true' ? true : false,
             agentArgs: {
-                prefix: systemMessage ?? `You are a helpful AI assistant.`
+                prefix: systemMessage ?? defaultMessage
             },
             returnIntermediateSteps: true
         })
diff --git a/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts b/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
index 9416371b..2a0c71cf 100644
--- a/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
+++ b/packages/components/nodes/chains/SqlDatabaseChain/SqlDatabaseChain.ts
@@ -5,6 +5,9 @@ import { DataSource } from 'typeorm'
 import { SqlDatabase } from 'langchain/sql_db'
 import { BaseLanguageModel } from 'langchain/base_language'
 import { ConsoleCallbackHandler, CustomChainHandler } from '../../../src/handler'
+import { DataSourceOptions } from 'typeorm/data-source'
+
+type DatabaseType = 'sqlite' | 'postgres' | 'mssql' | 'mysql'
 
 class SqlDatabaseChain_Chains implements INode {
     label: string
@@ -38,36 +41,48 @@ class SqlDatabaseChain_Chains implements INode {
                 type: 'options',
                 options: [
                     {
-                        label: 'SQlite',
+                        label: 'SQLite',
                         name: 'sqlite'
+                    },
+                    {
+                        label: 'PostgreSQL',
+                        name: 'postgres'
+                    },
+                    {
+                        label: 'MSSQL',
+                        name: 'mssql'
+                    },
+                    {
+                        label: 'MySQL',
+                        name: 'mysql'
                     }
                 ],
                 default: 'sqlite'
             },
             {
-                label: 'Database File Path',
-                name: 'dbFilePath',
+                label: 'Connection string or file path (sqlite only)',
+                name: 'url',
                 type: 'string',
-                placeholder: 'C:/Users/chinook.db'
+                placeholder: '1270.0.0.1:5432/chinook'
             }
         ]
     }
 
     async init(nodeData: INodeData): Promise<any> {
-        const databaseType = nodeData.inputs?.database as 'sqlite'
+        const databaseType = nodeData.inputs?.database as DatabaseType
         const model = nodeData.inputs?.model as BaseLanguageModel
-        const dbFilePath = nodeData.inputs?.dbFilePath
+        const url = nodeData.inputs?.url
 
-        const chain = await getSQLDBChain(databaseType, dbFilePath, model)
+        const chain = await getSQLDBChain(databaseType, url, model)
         return chain
     }
 
     async run(nodeData: INodeData, input: string, options: ICommonObject): Promise<string> {
-        const databaseType = nodeData.inputs?.database as 'sqlite'
+        const databaseType = nodeData.inputs?.database as DatabaseType
         const model = nodeData.inputs?.model as BaseLanguageModel
-        const dbFilePath = nodeData.inputs?.dbFilePath
+        const url = nodeData.inputs?.url
 
-        const chain = await getSQLDBChain(databaseType, dbFilePath, model)
+        const chain = await getSQLDBChain(databaseType, url, model)
         const loggerHandler = new ConsoleCallbackHandler(options.logger)
 
         if (options.socketIO && options.socketIOClientId) {
@@ -81,11 +96,18 @@ class SqlDatabaseChain_Chains implements INode {
     }
 }
 
-const getSQLDBChain = async (databaseType: 'sqlite', dbFilePath: string, llm: BaseLanguageModel) => {
-    const datasource = new DataSource({
-        type: databaseType,
-        database: dbFilePath
-    })
+const getSQLDBChain = async (databaseType: DatabaseType, url: string, llm: BaseLanguageModel) => {
+    const datasource = new DataSource(
+        databaseType === 'sqlite'
+            ? {
+                  type: databaseType,
+                  database: url
+              }
+            : ({
+                  type: databaseType,
+                  url: url
+              } as DataSourceOptions)
+    )
 
     const db = await SqlDatabase.fromDataSourceParams({
         appDataSource: datasource
diff --git a/packages/components/nodes/documentloaders/Folder/Folder.ts b/packages/components/nodes/documentloaders/Folder/Folder.ts
index 83bffd18..f5d0c640 100644
--- a/packages/components/nodes/documentloaders/Folder/Folder.ts
+++ b/packages/components/nodes/documentloaders/Folder/Folder.ts
@@ -61,7 +61,40 @@ class Folder_DocumentLoaders implements INode {
             '.csv': (path) => new CSVLoader(path),
             '.docx': (path) => new DocxLoader(path),
             // @ts-ignore
-            '.pdf': (path) => new PDFLoader(path, { pdfjs: () => import('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js') })
+            '.pdf': (path) => new PDFLoader(path, { pdfjs: () => import('pdf-parse/lib/pdf.js/v1.10.100/build/pdf.js') }),
+            '.aspx': (path) => new TextLoader(path),
+            '.asp': (path) => new TextLoader(path),
+            '.cpp': (path) => new TextLoader(path), // C++
+            '.c': (path) => new TextLoader(path),
+            '.cs': (path) => new TextLoader(path),
+            '.css': (path) => new TextLoader(path),
+            '.go': (path) => new TextLoader(path), // Go
+            '.h': (path) => new TextLoader(path), // C++ Header files
+            '.java': (path) => new TextLoader(path), // Java
+            '.js': (path) => new TextLoader(path), // JavaScript
+            '.less': (path) => new TextLoader(path), // Less files
+            '.ts': (path) => new TextLoader(path), // TypeScript
+            '.php': (path) => new TextLoader(path), // PHP
+            '.proto': (path) => new TextLoader(path), // Protocol Buffers
+            '.python': (path) => new TextLoader(path), // Python
+            '.py': (path) => new TextLoader(path), // Python
+            '.rst': (path) => new TextLoader(path), // reStructuredText
+            '.ruby': (path) => new TextLoader(path), // Ruby
+            '.rb': (path) => new TextLoader(path), // Ruby
+            '.rs': (path) => new TextLoader(path), // Rust
+            '.scala': (path) => new TextLoader(path), // Scala
+            '.sc': (path) => new TextLoader(path), // Scala
+            '.scss': (path) => new TextLoader(path), // Sass
+            '.sol': (path) => new TextLoader(path), // Solidity
+            '.sql': (path) => new TextLoader(path), //SQL
+            '.swift': (path) => new TextLoader(path), // Swift
+            '.markdown': (path) => new TextLoader(path), // Markdown
+            '.md': (path) => new TextLoader(path), // Markdown
+            '.tex': (path) => new TextLoader(path), // LaTeX
+            '.ltx': (path) => new TextLoader(path), // LaTeX
+            '.html': (path) => new TextLoader(path), // HTML
+            '.vb': (path) => new TextLoader(path), // Visual Basic
+            '.xml': (path) => new TextLoader(path) // XML
         })
         let docs = []