I built a full-featured SQLite database explorer using PyQt5 that provides a visual interface for managing SQLite databases. This tool allows users to:

Browse database structure

View and edit table data

Create/modify tables

Add/delete records

Perform schema modifications

🔧 Key Features Database Navigation Tree view of all tables in the database

Table viewer with full data display

Context menus for quick actions

Table Operations Create new tables with custom columns

Delete existing tables with confirmation

Add/remove columns through intuitive dialogs

Data Management Insert new records with type-aware inputs

Delete rows with referential integrity checks

Edit data directly in table view

💻 Technical Implementation Core Architecture python Copy class DatabaseExplorer(QMainWindow): def init(self): super().init() # Split view with tree (left) and table (right) self.splitter = QSplitter(Qt.Horizontal) self.treeView = QTreeView() # Shows database schema self.tableView = QTableView() # Shows table data Database Connection python Copy def loadDatabase(self): filePath = QFileDialog.getOpenFileName(...) if filePath: self.db = QSqlDatabase.addDatabase("QSQLITE") self.db.setDatabaseName(filePath) if self.db.open(): self.populateTreeView(filePath) Context-Aware UI python Copy def showContextMenu(self, position): contextMenu = QMenu(self) if index.isValid(): # Table selected contextMenu.addAction("Add", self.addColumn) contextMenu.addAction("Delete", self.deleteTable) else: # Empty space contextMenu.addAction("Add Table", self.addTable) 🛠️ Skills Demonstrated Database Engineering

SQLite schema inspection/manipulation

CRUD operation implementation

Referential integrity handling

UI/UX Development

Context-sensitive menus

Form validation and user feedback

Responsive layout management

Software Design

Model-View architecture

Clean separation of concerns

Error handling and recovery

🌟 Technical Highlights

1. Dynamic Table Creation python Copy def addTable(self):

   Interactive dialog for table creation

   dialog = QDialog(self)

   Dynamically generates inputs for each column

   for i in range(num_columns): column_name_input = QLineEdit() column_type_input = QComboBox() # Builds proper CREATE TABLE statement columns_str = ', '.join(columns) cursor.execute(f"CREATE TABLE {table_name} ({columns_str})")
2. Type-Aware Data Entry python Copy def addColumn(self):

   Gets column metadata

   cursor.execute(f"PRAGMA table_info({selected_table})")

   Creates appropriate input for each data type

   for column_name, column_type in column_details: if column_type == "INT": input = QSpinBox() else: input = QLineEdit()
3. Safe Deletion Handling python Copy def deleteTableRow(self, row):

   Finds primary key dynamically

   cursor.execute(f"PRAGMA table_info({selected_table})") primary_key_column = next((col[1] for col in columns_info if col[5] == 1))

   Confirms with user before deletion

   reply = QMessageBox.question(...) if reply == QMessageBox.Yes: cursor.execute(f"DELETE FROM {table} WHERE {pk} = ?", (value,)) 🚀 Usage bash Copy python sqlite_explorer.py Click "Load Database" to open a SQLite file

Browse tables in the left panel

Right-click for table operations

Edit data directly in the table view