Effortlessly convert code from swift to sql in just 3 easy steps. Streamline your development process now.
import SQLite3
sqlite3_open
function to open a connection to your database.sqlite3_prepare_v2
function to prepare your SQL statements.sqlite3_step
function to execute your SQL statements.sqlite3_close
function to close the connection.var db: OpaquePointer?
if sqlite3_open("myDatabase.sqlite", &db) == SQLITE_OK {
print("Successfully opened connection to database.")
} else {
print("Unable to open database.")
}
INSERT
SQL statement.
let insertStatementString = "INSERT INTO Contact (Id, Name) VALUES (?, ?);"
var insertStatement: OpaquePointer?
if sqlite3_prepare_v2(db, insertStatementString, -1, &insertStatement, nil) == SQLITE_OK {
sqlite3_bind_int(insertStatement, 1, 1)
sqlite3_bind_text(insertStatement, 2, "John Doe", -1, nil)
if sqlite3_step(insertStatement) == SQLITE_DONE {
print("Successfully inserted row.")
} else {
print("Could not insert row.")
}
} else {
print("INSERT statement could not be prepared.")
}
sqlite3_finalize(insertStatement)
SELECT
SQL statement.
let queryStatementString = "SELECT * FROM Contact;"
var queryStatement: OpaquePointer?
if sqlite3_prepare_v2(db, queryStatementString, -1, &queryStatement, nil) == SQLITE_OK {
while sqlite3_step(queryStatement) == SQLITE_ROW {
let id = sqlite3_column_int(queryStatement, 0)
let name = String(describing: String(cString: sqlite3_column_text(queryStatement, 1)))
print("Query Result:")
print("\(id) | \(name)")
}
} else {
print("SELECT statement could not be prepared.")
}
sqlite3_finalize(queryStatement)
Update
To update data in a database, use the UPDATE
SQL statement.
let updateStatementString = "UPDATE Contact SET Name = ? WHERE Id = ?;"
var updateStatement: OpaquePointer?
if sqlite3_prepare_v2(db, updateStatementString, -1, &updateStatement, nil) == SQLITE_OK {
sqlite3_bind_text(updateStatement, 1, "Jane Doe", -1, nil)
sqlite3_bind_int(updateStatement, 2, 1)
if sqlite3_step(updateStatement) == SQLITE_DONE {
print("Successfully updated row.")
} else {
print("Could not update row.")
}
} else {
print("UPDATE statement could not be prepared.")
}
sqlite3_finalize(updateStatement)
DELETE
SQL statement.
let deleteStatementString = "DELETE FROM Contact WHERE Id = ?;"
var deleteStatement: OpaquePointer?
if sqlite3_prepare_v2(db, deleteStatementString, -1, &deleteStatement, nil) == SQLITE_OK {
sqlite3_bind_int(deleteStatement, 1, 1)
if sqlite3_step(deleteStatement) == SQLITE_DONE {
print("Successfully deleted row.")
} else {
print("Could not delete row.")
}
} else {
print("DELETE statement could not be prepared.")
}
sqlite3_finalize(deleteStatement)
SQL (Structured Query Language) is a standard language for managing and manipulating databases.
How do I connect Swift to an SQL database?You can connect Swift to an SQL database using the SQLite library. Import SQLite, open a database connection, prepare SQL statements, execute them, and close the connection.
CRUD stands for Create, Read, Update, and Delete. These are the basic operations you can perform on a database.
Why use prepared statements?Prepared statements help prevent SQL injection attacks and improve performance by allowing the database to reuse execution plans.
Combining Swift with SQL allows developers to create powerful applications with efficient data management capabilities. By following best practices and using prepared statements, you can ensure your applications are secure and performant.