本文演示FastWeb网站开发中处理SQLite数据库
示例演示如何创建、查询、删除与更新，SQL在文章底部。
local dkjson = require("dkjson")
local db = sqlite_db.new()
-- 清空示例
function sqlite_delete()-- 清空数据local ppst = db:setsql("DELETE FROM users")ppst:update()
end
-- 插入数据
function sqlite_insert()local ppst = db:setsql("INSERT INTO users(username,password)VALUES(?,?)")-- 文本ppst:set_str(1,"fastweb")ppst:set_str(2,"123456")ppst:update()
end
-- 更新数据
function sqlite_update()local ppst = db:setsql("UPDATE users SET password = ? WHERE username = ?")ppst:set_str(1,"666666")ppst:set_str(2,"fastweb")ppst:update()
end
-- 查询数据
function sqlite_select()local ppst = db:setsql("SELECT * FROM users WHERE id > 0")ppst:set_i32(1,0)-- 查询结果local result = ppst:query();local users = {}while result:next() dolocal user = {username = result:get("username"),password = result:get("password"),}table.insert(users,user)endreturn users;
end-- 打开
if db:open("data.db") == false thenresponse:send("sqlite open failed,"..db:last_error())return
end
-- 创建表
local ppst = db:setsql("CREATE TABLE users(id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, username TEXT, password TEXT );")
if ppst ~= nil thenppst:update()
end--sqlite_delete()
sqlite_insert()
sqlite_update()
sqlite_select()
local users =sqlite_select()
response:send(dkjson.encode(users))
