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Changes for page 2 Script

Last modified by Devin Chen on 2025/06/06 14:03
From version 63.1
edited by Theodore Xu
on 2023/08/24 17:28
Change comment: There is no comment for this version
To version 70.1
edited by Theodore Xu
on 2023/08/25 09:48
Change comment: There is no comment for this version

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1482 1482  
1483 1483  [[image:image-20220709165402-21.png]]
1484 1484  
1485 -= **2.7 Mysql** =
1485 +== **2.7 Mysql** ==
1486 +
1487 +=== 1.Install Mysql software ===
1488 +
1489 +Download the latest version of Mysql.
1490 +
1491 +(% style="text-align:center" %)
1492 +[[image:Mysql的软件版本.png]]
1493 +
1494 +=== 2.Navicat connect Mysql ===
1495 +
1496 +Connecting to Mysql with navicat.
1497 +
1498 +(% style="text-align:center" %)
1499 +[[image:连接到mysql.png]]
1500 +
1501 +=== 3.Create database ===
1502 +
1503 +Character set should be choose utf8mb3/utf8mb4 and Collation choose utf8mb3_danish_ci/utf8mb4_danish_ci.
1504 +
1505 +(% style="text-align:center" %)
1506 +[[image:创建数据库.png]]
1507 +
1508 +=== 4.Create data table ===
1509 +
1510 +Create a table, enter the fields you need.
1511 +
1512 +(% style="text-align:center" %)
1513 +[[image:创建表1.png]]
1514 +
1515 +Save, enter table name.
1516 +
1517 +(% style="text-align:center" %)
1518 +[[image:创建表2.png]]
1519 +
1520 +=== 5.Input Table Data ===
1521 +
1522 +(% style="text-align:center" %)
1523 +[[image:输入或者导入数据.png]]
1524 +
1525 +=== 6.Script ===
1526 +
1527 +**luaMySql.init(string sourcename, string username, string password, string host, number port, string character)**
1528 +
1529 +**Function:** Configure database connection parameters
1530 +
1531 +**Parameter:**
1532 +
1533 +sourcename: the name of database
1534 +
1535 +username: the username of the connection
1536 +
1537 +password: the password of the connection
1538 +
1539 +host: the host name of the connection
1540 +
1541 +port: the host port of the connection
1542 +
1543 +character: the character set of the connection
1544 +
1545 +**Return:**
1546 +
1547 +Succeed: string
1548 +
1549 +Failed: multi
1550 +
1551 +**luaMySql.exec(string statement)**
1552 +
1553 +**Function:** Execute the given SQL statement without returning the result set (add, delete, change)
1554 +
1555 +**Parameter:**
1556 +
1557 +statement: the given SQL statement
1558 +
1559 +**Return:**
1560 +
1561 +Succeed: status: returns the number of rows affected by SQL statement execution.
1562 +
1563 +Failed: nil, errorString
1564 +
1565 +**luaMySql.execWithResult(string statement)**
1566 +
1567 +**Function:** Execute the given SQL statement returning the result set (check)
1568 +
1569 +**Parameter:**
1570 +
1571 +statement: the given SQL statement
1572 +
1573 +**Return:**
1574 +
1575 +Succeed: table: returns the result set
1576 +
1577 +Failed: nil, errorString
1578 +
1579 +**For example:**
1580 +
1581 +
1582 +{{code language="LUA"}}
1583 +-- Assuming the "mysqlclient" library is properly installed and available
1584 +mysql = require("mysqlclient")
1585 +
1586 +function DataInitRight()
1587 + local dbName = "excel"
1588 + local user = "root"
1589 + local pwd = "XXXXX"
1590 + local host = "192.168.39.146"
1591 + local port = 3306
1592 + local character = "utf8mb3"
1593 +
1594 + mysql.init(dbName, user, pwd, host, port, character)
1595 +end
1596 +
1597 +function ExecFunc()
1598 + status, errorString = mysql.exec("delete from student where Name = 'XXX';") --Delete statement, column name = table element
1599 + if nil == status then
1600 + print("ExecFunc() error:", errorString)
1601 + return -1
1602 + else
1603 + print("the number of rows affected by the command:", status)
1604 + end
1605 + return 0
1606 +end
1607 +
1608 +
1609 +function ExecWithResultFunc()
1610 + status, errorString = mysql.execWithResult("select * from student;")
1611 + if nil == status then
1612 + print("ExecWithResultFunc() error:", errorString)
1613 + return -1
1614 + else
1615 + print("ExecWithResultFunc() success : status type = ", type(status))
1616 + print("ExecWithResultFunc() success : status len = ", #status)
1617 + local num = #status
1618 + local i = 1
1619 + if num > 0 then
1620 + for i = 1, num, 1 do
1621 + local var = string.format("select result[%d] :Num = %d，Name = %s，Age = %d", i, status[i].Num, status[i].Name,status[i].Age) --Iterate through the data in the table, noting whether the elements are strings or numbers
1622 + print(var)
1623 + end
1624 + end
1625 + print("---------------")
1626 + end
1627 + return 0
1628 +end
1629 +
1630 +function MySQL.main()
1631 + print("script running ...")
1632 + DataInitRight()
1633 +
1634 + -- use exec demo
1635 + if ExecFunc() < 0 then
1636 + return
1637 + end
1638 +
1639 + -- use execWithResult demo
1640 + if ExecWithResultFunc() < 0 then
1641 + return
1642 + end
1643 +
1644 + print("script running success")
1645 +end
1646 +{{/code}}
1647 +
1648 +=== 7.Debug ===
1649 +
1650 +(% style="text-align:center" %)
1651 +[[image:调试结果.png]]
1652 +
1653 +=== 8.Problem ===
1654 +
1655 +During our debugging process it may there are some problems about Mysql， such as
1656 +
1657 +* MySQL: Host  192.168.XXX.XXX  is not allowed to connect.
1658 +* MySQL: Host  192.168.XXX.XXX  is blocked because of many connection errors.
1659 +* MySQL: SSL connection error: unknown error number.
1660 +* (((
1661 +1449-The user specified as a definer(‘mysql.infoschema‘@localhost‘) does not exist.
1662 +)))
1663 +
1664 +This type of problem has nothing to do with scripts or devices, it is a Mysql configuration issue. If you have any of these problems, please look for a solution online.
1665 +
1666 +{{info}}
1667 +✎Note: If you want to use CMD to access Mysql, you need to add the bin file to the environment variable, please check online for details of the operation.
1668 +{{/info}}
Mysql的软件版本.png
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