Select 来自 db table 1 的数据并将其插入另一个 db table 2 in php

Question

我有两个不同的数据库，名称：

数据库测试：Table 1
dbtest2: Table 2

我想 select 从 dbtest Table 1 到 dbtest2 Table 2.

的所有数据和新条目

我试过了

$sqlfin = "INSERT INTO dbtest2.Table2 SELECT * FROM dbtest.Table1";
$resultfi = mysqli_query($db_conn, $sqlfin);

但到目前为止运气不好。我如何确保将新记录插入到 table 中？任何帮助将不胜感激？

Answer 1

INSERT INTO dbtest2 ( 
      id, 
      name, 
      status ) 
SELECT id, 
      name,          
       '1'
FROM dbtest
ORDER BY id ASC

您可以使用 INSERT...SELECT 语法。请注意，您可以在 SELECT 部分直接引用 '1'。

Answer 2

针对您想要的任务尝试此查询：

首先查询 （创建Table与旧数据库完全相同，如果你没有）:

CREATE TABLE dbtest2.Table2 LIKE dbtest.Table1;

Query Second (Insert all data to new created table) :

INSERT INTO dbtest2.Table2 SELECT * FROM dbtest.Table1;

Answer 3

让我们试试这个格式

INSERT INTO `dbtest2`.`Table2` SELECT * FROM `dbtest`.`Table1`

The following conditions hold for INSERT ... SELECT statements:

Specify IGNORE to ignore rows that would cause duplicate-key violations.

AUTO_INCREMENT columns work as usual.

To ensure that the binary log can be used to re-create the original tables, MySQL does not permit concurrent inserts for INSERT ... SELECT statements (see Section 8.11.3, “Concurrent Inserts”).

To avoid ambiguous column reference problems when the SELECT and the INSERT refer to the same table, provide a unique alias for each table used in the SELECT part, and qualify column names in that part with the appropriate alias.

INSERT ... SELECT Syntax

创建触发器： 用于添加新条目

CREATE TRIGGER copy_record BEFORE INSERT ON dbtest.Table1 
FOR EACH ROW 
BEGIN 
   INSERT INTO dbtest2.Table2 (first_name, last_name) VALUES (new.first_name, new.last_name); 
END

trigger_event indicates the kind of operation that activates the trigger. These trigger_event values are permitted:
INSERT: The trigger activates whenever a new row is inserted into the table; for example, through INSERT, LOAD DATA, and REPLACE
statements.
UPDATE: The trigger activates whenever a row is modified; for example, through UPDATE statements.

DELETE: The trigger activates whenever a row is deleted from the table; for example, through DELETE and REPLACE statements. DROP TABLE
and TRUNCATE TABLE statements on the table do not activate this trigger, because they do not use DELETE. Dropping a partition does not activate DELETE triggers, either.

CREATE TRIGGER Syntax

Answer 4

您的查询看起来是正确的，但如果这两个表的结构不同，查询就会失败。指定列以避免它，如：

INSERT INTO dbtest2.Table2 (2_col_1, 2_col_2) SELECT 1_col_1, 1_col_2 FROM dbtest.Table1

使用 PDO（另一种答案，我对 Mysqli 了解不多）：
您可以使用 PDO 连接到 Mysql 而无需在使用多个 时提供数据库名称（但这是'强制），如：

$db = new PDO( "mysql:host=" . $host . ";", $user, $password, $options );

然后像制作 JOIN 一样写数据库名称、表和列（就像您所做的那样）：用 .

分隔

// an example ..
$useDb = $db->query("INSERT INTO db_1.table1 (value_1, value_2) SELECT value_3, value_4 FROM db_2.table2 WHERE db_2.table2.id = 5");

（示例已测试且工作正常）

Select 来自 db table 1 的数据并将其插入另一个 db table 2 in php

Select data from db table 1 and insert it into another db table 2 in php

php

mysql

triggers

bulkinsert

sql-insert