In the statement, we sort the data by two columns: price and name. The name is in descending order. SQLite select specific rows with WHEREThe next set of examples uses the Orders table. sqlite> SELECT * FROM Orders; Id OrderPrice Customer --- --- --- 1 1200 Williamson 2 200 Roberts...
let queryTradingDaysStatement = """ Select FundName, TimeStamp, Close FROM TradingDays WHERE FundName = '\(fundName)' AND CASE strftime('%w') WHEN '0' then TimeStamp >= date('now', '-2 days', 'start of day', '-\(numYears) year') WHEN '6' then TimeStamp >= date('now',...
6 String url = "jdbc:sqlite:E:\\test.db"; 7 String sql = "select * from chenbenbuyi"; 8 Connection conn = null; 9 Statement stmt = null; 10 ResultSet rs = null; 11 try { 12 //加载驱动 13 Class.forName(driver); 14 //获取连接 15 conn = DriverManager.getConnection(url); //...
const result = db.exec("SELECT * FROM users WHERE age > 30"); 1. 2. 3. 4. 5. 6.3 内存管理 对于大型数据库,注意内存使用: // 释放不再使用的Statement stmt.free(); // 定期清理不再需要的数据 db.run("DELETE FROM logs WHERE created_at < ?", [oldDate]); 1. 2. 3. 4. 5. 6....
I'm using the latest version of better-sqlite3 and I have some simple code that looks like the following: const statements = { fetch: db.prepare(`SELECT "id", "data" FROM "migrations" WHERE "done" = 0;`), migrate: db.prepare(`UPDATE "mig...
static void ManagedWrapperMain() { var connStr = new SQLiteConnectionStringBuilder() { DataSource = "persons.sqlite" }; using (SQLiteConnection conn = new SQLiteConnection(connStr.ToString())) { conn.Open(); SQLiteCommand cmd = conn.CreateCommand(); cmd.CommandText = "SELECT COUNT(...
execute(conn,sqlquery)executes an SQL query that contains a non-SELECTSQL statement by using the SQLite database connection with the MATLAB®interface to SQLite. example Examples collapse all Execute Non-SELECTSQL Statement Using an SQLite database connection and the MATLAB® interface to SQLite...
constresult=awaitdb.all('SELECT col FROM tbl')// [{ col: 'test' }] Inserting rows constresult=awaitdb.run('INSERT INTO tbl (col) VALUES (?)','foo')/*{// row ID of the inserted rowlastID: 1,// instance of `sqlite#Statement`// which is a wrapper around `sqlite3#Statement`stm...
After a BEGIN command, a SHARED lock will be acquired when the first SELECT statement is executed. A RESERVED lock will be acquired when the first INSERT, UPDATE, or DELETE statement is executed. No EXCLUSIVE lock is acquired until either the memory cache fills up and must be spilled to ...
statement.executeUpdate("create table person (id integer, name string)"); statement.executeUpdate("insert into person values(1, 'leo')"); statement.executeUpdate("insert into person values(2, 'yui')"); ResultSet rs = statement.executeQuery("select * from person");while(rs.next()) ...