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My php code can't select mysql auto_increment value


My php code can't select mysql auto_increment value

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My php code can't select mysql auto_increment value
Tag : php , By : Shrek Qian
Date : November 28 2020, 01:01 AM


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MySQL create temporary table with auto_increment id and select query


Tag : mysql , By : Vlad Sirenko
Date : March 29 2020, 07:55 AM
this one helps. want to create a temporary table that has an auto_increment field plus a field that has to be select from another table.
CREATE TEMPORARY TABLE tmp (
    id INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
    valueName  varchar(16) // whatever type it should be
);

INSERT INTO tmp (valueName) SELECT valueName FROM sometable WHERE ...

MySQL - INSERT INTO xxx SELECT with AUTO_INCREMENT column


Tag : mysql , By : Vijayant Singh
Date : March 29 2020, 07:55 AM
like below fixes the issue I have an old_table and a new_table:
set @sql =  (select concat('insert into new_table SELECT NULL,',
             group_concat(column_name),' from ','old_table') from information_schema.columns
         where table_name = 'old_table' and table_schema = '<database>' and column_name != 'id'
             order by ordinal_position);

prepare stmt1 from @sql;
execute stmt1;
deallocate prepare stmt1;
<database> - your database

Select every second row mysql without auto_increment or data of table


Tag : mysql , By : UnKnownUser
Date : March 29 2020, 07:55 AM
Hope that helps Assuming you're using a version of MySQL new enough to support subqueries -- and if not, what are you still doing on MySQL 3? -- here's an example of how it's done, using a temporary table with meaningless contents:
 mysql> create temporary table t (n text);
 Query OK, 0 rows affected (0.00 sec)

 mysql> insert into t (n) values ('a'), ('b'), ('c'), ('d'), ('e');
 Query OK, 5 rows affected (0.00 sec)
 Records: 5  Duplicates: 0  Warnings: 0

 mysql> select * from t;
 +------+
 | n    |
 +------+
 | a    | 
 | b    | 
 | c    | 
 | d    | 
 | e    | 
 +------+

 mysql> SET @i = 0; SELECT i, n FROM (SELECT @i := @i + 1 AS i, n FROM t) a WHERE MOD(a.i, 2) = 0;
 Query OK, 0 rows affected (0.00 sec)

 +------+------+
 | i    | n    |
 +------+------+
 |    2 | b    | 
 |    4 | d    | 
 +------+------+
 2 rows in set (0.00 sec)

 mysql> SET @i = 0; SELECT i, n FROM (SELECT @i := @i + 1 AS i, n FROM t) a WHERE MOD(a.i, 2) = 1;
 Query OK, 0 rows affected (0.00 sec)

 +------+------+
 | i    | n    |
 +------+------+
 |    1 | a    | 
 |    3 | c    | 
 |    5 | e    | 
 +------+------+
 2 rows in set (0.00 sec)

MySQL INSERT INTO SELECT into a table with AUTO_INCREMENT


Tag : mysql , By : Stephen Judge
Date : March 29 2020, 07:55 AM
wish of those help Consider the following table: , You must name the columns
INSERT INTO FooAttachments (FooId, AttachmentPath)
SELECT 1 AS FooId, 'test path' as AttachmentPath;

In MySQL 5.0, can one insert into a table with an auto_increment column without updating the auto_increment value?


Tag : mysql , By : Adam
Date : March 29 2020, 07:55 AM
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