How to connect to a database using Lua?

2 years ago
Benjamin Taylor
2 minutes

In Lua, connecting to a database requires the appropriate database driver and library.

Here is an example of connecting to a MySQL database using Lua:

  1. Firstly, you need to install the lua-mysql library. You can install it using the LuaRocks tool.
  2. Load the lua-mysql library in Lua script using the require statement.
local mysql = require("luasql.mysql")
  1. Establishing a connection to the database:
local env = mysql.mysql()
local conn = env:connect("your_database", "username", "password", "hostname", port)

In this case, “your_database” is the name of the database to connect to, “username” and “password” are the username and password for the database, “hostname” is the host name of the database server, and port is the port number of the database server.

  1. Execute SQL query:
cursor = conn:execute("SELECT * FROM your_table")

In this case, “your_table” is the name of the table to be queried.

  1. Handle search results.
row = cursor:fetch({}, "a")
while row do
  -- 处理每一行数据
  -- 可以使用row.field_name来访问每个字段的值
  row = cursor:fetch(row, "a")
end
  1. Close the database connection.
cursor:close()
conn:close()

The above is a basic example of connecting to a MySQL database. If you want to connect to a different type of database, you will need to use the corresponding database driver and library, and make appropriate calls according to its API.

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