getting data directly from insert query after running it - mysql

i have a database i insert item into using php. i want to get the ID which is auto increment column, i read the manual and it says that the mysql_query returns a resource variable rather than boolean, is there any way to retreive data from that resouce?
echo $query_ins = "INSERT INTO `house` VALUES ('' , '$city', '$street', 'num');
$res = mysql_query($query_ins);
the first field is the ID field i am interested in.
i tried mysql_fetch_assoc and mysql_result function to convert the $res into array or retrieve data directly like i would do with SELECT query but no succes.
any suggestions?


See the manual: mysql_insert_id — Get the ID generated in the last query
This is really something you should have been able to find on your own easily, without posting to StackOverflow. It's to your advantage to review the documentation of any API you're using.
Re your comment:
SELECT * FROM house WHERE id = LAST_INSERT_ID()
This supposes you have an auto-incrementing primary key.
If you generate a nondeterministic primary key value on insert, for example using RAND() or UUID(), then there is effectively no way to retrieve the value generated. You should generate the value before doing the INSERT, so you have a literal value you can use to look up the row.
SET #r := RAND();
INSERT INTO house (id, ...) VALUES (#r, ...);
SELECT * FROM house WHERE id = #r;
MD5 is deterministic, so supposing you have an original key string that you hash, you should be able to retrieve the row using that MD5 expression and the original string.
INSERT INTO house (id, ...) VALUES (MD5('xyzzy'), ...);
SELECT * FROM house WHERE id = MD5('xyzzy');

Related

Foreign Key keeps returning NULL? [duplicate]

Let's say I am doing a MySQL INSERT into one of my tables and the table has the column item_id which is set to autoincrement and primary key.
How do I get the query to output the value of the newly generated primary key item_id in the same query?
Currently I am running a second query to retrieve the id but this hardly seems like good practice considering this might produce the wrong result...
If this is not possible then what is the best practice to ensure I retrieve the correct id?

You need to use the LAST_INSERT_ID() function: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
Eg:
INSERT INTO table_name (col1, col2,...) VALUES ('val1', 'val2'...);
SELECT LAST_INSERT_ID();
This will get you back the PRIMARY KEY value of the last row that you inserted:
The ID that was generated is maintained in the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client.
So the value returned by LAST_INSERT_ID() is per user and is unaffected by other queries that might be running on the server from other users.

BEWARE !! of LAST_INSERT_ID() if trying to return this primary key value within PHP.
I know this thread is not tagged PHP, but for anybody who came across this answer looking to return a MySQL insert id from a PHP scripted insert using standard mysql_query calls - it wont work and is not obvious without capturing SQL errors.
The newer mysqli supports multiple queries - which LAST_INSERT_ID() actually is a second query from the original.
IMO a separate SELECT to identify the last primary key is safer than the optional mysql_insert_id() function returning the AUTO_INCREMENT ID generated from the previous INSERT operation.

From the LAST_INSERT_ID() documentation:
The ID that was generated is maintained in the server on a per-connection basis
That is if you have two separate requests to the script simultaneously they won't affect each others' LAST_INSERT_ID() (unless you're using a persistent connection perhaps).

You will receive these parameters on your query result:
"fieldCount": 0,
"affectedRows": 1,
"insertId": 66,
"serverStatus": 2,
"warningCount": 1,
"message": "",
"protocol41": true,
"changedRows": 0
The insertId is exactly what you need.
(NodeJS-mySql)

Here what you are looking for !!!
select LAST_INSERT_ID()
This is the best alternative of SCOPE_IDENTITY() function being used in SQL Server.
You also need to keep in mind that this will only work if Last_INSERT_ID() is fired following by your Insert query.
That is the query returns the id inserted in the schema. You can not get specific table's last inserted id.
For more details please go through the link The equivalent of SQLServer function SCOPE_IDENTITY() in mySQL?

If in python using pymysql, from the cursor you can use cursor.lastrowid.
It is a documented extension in PEP-249 DB API standard, and also works with other Python MySQL implementations.

You need to use the LAST_INSERT_ID() function with transaction:
START TRANSACTION;
INSERT INTO dog (name, created_by, updated_by) VALUES ('name', 'migration', 'migration');
SELECT LAST_INSERT_ID();
COMMIT;
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
This function will be return last inserted primary key in table.

Simply use:
$last_id = mysqli_insert_id($conn);

If you need the value before insert a row:
CREATE FUNCTION `getAutoincrementalNextVal`(`TableName` VARCHAR(50))
RETURNS BIGINT
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
DECLARE Value BIGINT;
SELECT
AUTO_INCREMENT INTO Value
FROM
information_schema.tables
WHERE
table_name = TableName AND
table_schema = DATABASE();
RETURN Value;
END
You can use this in a insert:
INSERT INTO
document (Code, Title, Body)
VALUES (
sha1( concat (convert ( now() , char), ' ', getAutoincrementalNextval ('document') ) ),
'Title',
'Body'
);

If you are using PHP: On a PDO object you can simple invoke the
lastInsertId method after your insert.
Otherwise with a LAST_INSERT_ID you can get the value like this: SELECT LAST_INSERT_ID();

i used return $this->db->insert_id(); for Codeigniter

Do this:
$idc = DB::table('tb_clients')->insertGetId([
'ide' => $ide,
'nome' => $nome,
'email' => $email
]);
on $idc you will get the last id

I just want to share my approach to this in PHP, some of you may found it not an efficient way but this is a 100 better than other available options.
generate a random key and insert it into the table creating a new row.
then you can use that key to retrieve the primary key.
use the update to add data and do other stuff.
doing this way helps to secure a row and have the correct primary key.
I really don't recommend this unless you don't have any other options.

Mysql SELECT value during transaction to use in same process [duplicate]

Let's say I am doing a MySQL INSERT into one of my tables and the table has the column item_id which is set to autoincrement and primary key.
How do I get the query to output the value of the newly generated primary key item_id in the same query?
Currently I am running a second query to retrieve the id but this hardly seems like good practice considering this might produce the wrong result...
If this is not possible then what is the best practice to ensure I retrieve the correct id?

You need to use the LAST_INSERT_ID() function: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
Eg:
INSERT INTO table_name (col1, col2,...) VALUES ('val1', 'val2'...);
SELECT LAST_INSERT_ID();
This will get you back the PRIMARY KEY value of the last row that you inserted:
The ID that was generated is maintained in the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client.
So the value returned by LAST_INSERT_ID() is per user and is unaffected by other queries that might be running on the server from other users.

BEWARE !! of LAST_INSERT_ID() if trying to return this primary key value within PHP.
I know this thread is not tagged PHP, but for anybody who came across this answer looking to return a MySQL insert id from a PHP scripted insert using standard mysql_query calls - it wont work and is not obvious without capturing SQL errors.
The newer mysqli supports multiple queries - which LAST_INSERT_ID() actually is a second query from the original.
IMO a separate SELECT to identify the last primary key is safer than the optional mysql_insert_id() function returning the AUTO_INCREMENT ID generated from the previous INSERT operation.

From the LAST_INSERT_ID() documentation:
The ID that was generated is maintained in the server on a per-connection basis
That is if you have two separate requests to the script simultaneously they won't affect each others' LAST_INSERT_ID() (unless you're using a persistent connection perhaps).

You will receive these parameters on your query result:
"fieldCount": 0,
"affectedRows": 1,
"insertId": 66,
"serverStatus": 2,
"warningCount": 1,
"message": "",
"protocol41": true,
"changedRows": 0
The insertId is exactly what you need.
(NodeJS-mySql)

Here what you are looking for !!!
select LAST_INSERT_ID()
This is the best alternative of SCOPE_IDENTITY() function being used in SQL Server.
You also need to keep in mind that this will only work if Last_INSERT_ID() is fired following by your Insert query.
That is the query returns the id inserted in the schema. You can not get specific table's last inserted id.
For more details please go through the link The equivalent of SQLServer function SCOPE_IDENTITY() in mySQL?

If in python using pymysql, from the cursor you can use cursor.lastrowid.
It is a documented extension in PEP-249 DB API standard, and also works with other Python MySQL implementations.

You need to use the LAST_INSERT_ID() function with transaction:
START TRANSACTION;
INSERT INTO dog (name, created_by, updated_by) VALUES ('name', 'migration', 'migration');
SELECT LAST_INSERT_ID();
COMMIT;
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
This function will be return last inserted primary key in table.

Simply use:
$last_id = mysqli_insert_id($conn);

If you need the value before insert a row:
CREATE FUNCTION `getAutoincrementalNextVal`(`TableName` VARCHAR(50))
RETURNS BIGINT
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
DECLARE Value BIGINT;
SELECT
AUTO_INCREMENT INTO Value
FROM
information_schema.tables
WHERE
table_name = TableName AND
table_schema = DATABASE();
RETURN Value;
END
You can use this in a insert:
INSERT INTO
document (Code, Title, Body)
VALUES (
sha1( concat (convert ( now() , char), ' ', getAutoincrementalNextval ('document') ) ),
'Title',
'Body'
);

If you are using PHP: On a PDO object you can simple invoke the
lastInsertId method after your insert.
Otherwise with a LAST_INSERT_ID you can get the value like this: SELECT LAST_INSERT_ID();

i used return $this->db->insert_id(); for Codeigniter

Do this:
$idc = DB::table('tb_clients')->insertGetId([
'ide' => $ide,
'nome' => $nome,
'email' => $email
]);
on $idc you will get the last id

I just want to share my approach to this in PHP, some of you may found it not an efficient way but this is a 100 better than other available options.
generate a random key and insert it into the table creating a new row.
then you can use that key to retrieve the primary key.
use the update to add data and do other stuff.
doing this way helps to secure a row and have the correct primary key.
I really don't recommend this unless you don't have any other options.

Best way to insert at the same time a row with an auto-increment ID and a row with foreign key references the auto-increment ID [duplicate]

Let's say I am doing a MySQL INSERT into one of my tables and the table has the column item_id which is set to autoincrement and primary key.
How do I get the query to output the value of the newly generated primary key item_id in the same query?
Currently I am running a second query to retrieve the id but this hardly seems like good practice considering this might produce the wrong result...
If this is not possible then what is the best practice to ensure I retrieve the correct id?

You need to use the LAST_INSERT_ID() function: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
Eg:
INSERT INTO table_name (col1, col2,...) VALUES ('val1', 'val2'...);
SELECT LAST_INSERT_ID();
This will get you back the PRIMARY KEY value of the last row that you inserted:
The ID that was generated is maintained in the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client.
So the value returned by LAST_INSERT_ID() is per user and is unaffected by other queries that might be running on the server from other users.

BEWARE !! of LAST_INSERT_ID() if trying to return this primary key value within PHP.
I know this thread is not tagged PHP, but for anybody who came across this answer looking to return a MySQL insert id from a PHP scripted insert using standard mysql_query calls - it wont work and is not obvious without capturing SQL errors.
The newer mysqli supports multiple queries - which LAST_INSERT_ID() actually is a second query from the original.
IMO a separate SELECT to identify the last primary key is safer than the optional mysql_insert_id() function returning the AUTO_INCREMENT ID generated from the previous INSERT operation.

From the LAST_INSERT_ID() documentation:
The ID that was generated is maintained in the server on a per-connection basis
That is if you have two separate requests to the script simultaneously they won't affect each others' LAST_INSERT_ID() (unless you're using a persistent connection perhaps).

You will receive these parameters on your query result:
"fieldCount": 0,
"affectedRows": 1,
"insertId": 66,
"serverStatus": 2,
"warningCount": 1,
"message": "",
"protocol41": true,
"changedRows": 0
The insertId is exactly what you need.
(NodeJS-mySql)

Here what you are looking for !!!
select LAST_INSERT_ID()
This is the best alternative of SCOPE_IDENTITY() function being used in SQL Server.
You also need to keep in mind that this will only work if Last_INSERT_ID() is fired following by your Insert query.
That is the query returns the id inserted in the schema. You can not get specific table's last inserted id.
For more details please go through the link The equivalent of SQLServer function SCOPE_IDENTITY() in mySQL?

If in python using pymysql, from the cursor you can use cursor.lastrowid.
It is a documented extension in PEP-249 DB API standard, and also works with other Python MySQL implementations.

You need to use the LAST_INSERT_ID() function with transaction:
START TRANSACTION;
INSERT INTO dog (name, created_by, updated_by) VALUES ('name', 'migration', 'migration');
SELECT LAST_INSERT_ID();
COMMIT;
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
This function will be return last inserted primary key in table.

Simply use:
$last_id = mysqli_insert_id($conn);

If you need the value before insert a row:
CREATE FUNCTION `getAutoincrementalNextVal`(`TableName` VARCHAR(50))
RETURNS BIGINT
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
DECLARE Value BIGINT;
SELECT
AUTO_INCREMENT INTO Value
FROM
information_schema.tables
WHERE
table_name = TableName AND
table_schema = DATABASE();
RETURN Value;
END
You can use this in a insert:
INSERT INTO
document (Code, Title, Body)
VALUES (
sha1( concat (convert ( now() , char), ' ', getAutoincrementalNextval ('document') ) ),
'Title',
'Body'
);

If you are using PHP: On a PDO object you can simple invoke the
lastInsertId method after your insert.
Otherwise with a LAST_INSERT_ID you can get the value like this: SELECT LAST_INSERT_ID();

i used return $this->db->insert_id(); for Codeigniter

Do this:
$idc = DB::table('tb_clients')->insertGetId([
'ide' => $ide,
'nome' => $nome,
'email' => $email
]);
on $idc you will get the last id

I just want to share my approach to this in PHP, some of you may found it not an efficient way but this is a 100 better than other available options.
generate a random key and insert it into the table creating a new row.
then you can use that key to retrieve the primary key.
use the update to add data and do other stuff.
doing this way helps to secure a row and have the correct primary key.
I really don't recommend this unless you don't have any other options.

Get the new record primary key ID from MySQL insert query?

Let's say I am doing a MySQL INSERT into one of my tables and the table has the column item_id which is set to autoincrement and primary key.
How do I get the query to output the value of the newly generated primary key item_id in the same query?
Currently I am running a second query to retrieve the id but this hardly seems like good practice considering this might produce the wrong result...
If this is not possible then what is the best practice to ensure I retrieve the correct id?

You need to use the LAST_INSERT_ID() function: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
Eg:
INSERT INTO table_name (col1, col2,...) VALUES ('val1', 'val2'...);
SELECT LAST_INSERT_ID();
This will get you back the PRIMARY KEY value of the last row that you inserted:
The ID that was generated is maintained in the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client.
So the value returned by LAST_INSERT_ID() is per user and is unaffected by other queries that might be running on the server from other users.

BEWARE !! of LAST_INSERT_ID() if trying to return this primary key value within PHP.
I know this thread is not tagged PHP, but for anybody who came across this answer looking to return a MySQL insert id from a PHP scripted insert using standard mysql_query calls - it wont work and is not obvious without capturing SQL errors.
The newer mysqli supports multiple queries - which LAST_INSERT_ID() actually is a second query from the original.
IMO a separate SELECT to identify the last primary key is safer than the optional mysql_insert_id() function returning the AUTO_INCREMENT ID generated from the previous INSERT operation.

From the LAST_INSERT_ID() documentation:
The ID that was generated is maintained in the server on a per-connection basis
That is if you have two separate requests to the script simultaneously they won't affect each others' LAST_INSERT_ID() (unless you're using a persistent connection perhaps).

You will receive these parameters on your query result:
"fieldCount": 0,
"affectedRows": 1,
"insertId": 66,
"serverStatus": 2,
"warningCount": 1,
"message": "",
"protocol41": true,
"changedRows": 0
The insertId is exactly what you need.
(NodeJS-mySql)

Here what you are looking for !!!
select LAST_INSERT_ID()
This is the best alternative of SCOPE_IDENTITY() function being used in SQL Server.
You also need to keep in mind that this will only work if Last_INSERT_ID() is fired following by your Insert query.
That is the query returns the id inserted in the schema. You can not get specific table's last inserted id.
For more details please go through the link The equivalent of SQLServer function SCOPE_IDENTITY() in mySQL?

If in python using pymysql, from the cursor you can use cursor.lastrowid.
It is a documented extension in PEP-249 DB API standard, and also works with other Python MySQL implementations.

You need to use the LAST_INSERT_ID() function with transaction:
START TRANSACTION;
INSERT INTO dog (name, created_by, updated_by) VALUES ('name', 'migration', 'migration');
SELECT LAST_INSERT_ID();
COMMIT;
http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
This function will be return last inserted primary key in table.

Simply use:
$last_id = mysqli_insert_id($conn);

If you need the value before insert a row:
CREATE FUNCTION `getAutoincrementalNextVal`(`TableName` VARCHAR(50))
RETURNS BIGINT
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
DECLARE Value BIGINT;
SELECT
AUTO_INCREMENT INTO Value
FROM
information_schema.tables
WHERE
table_name = TableName AND
table_schema = DATABASE();
RETURN Value;
END
You can use this in a insert:
INSERT INTO
document (Code, Title, Body)
VALUES (
sha1( concat (convert ( now() , char), ' ', getAutoincrementalNextval ('document') ) ),
'Title',
'Body'
);

If you are using PHP: On a PDO object you can simple invoke the
lastInsertId method after your insert.
Otherwise with a LAST_INSERT_ID you can get the value like this: SELECT LAST_INSERT_ID();

i used return $this->db->insert_id(); for Codeigniter

Do this:
$idc = DB::table('tb_clients')->insertGetId([
'ide' => $ide,
'nome' => $nome,
'email' => $email
]);
on $idc you will get the last id

I just want to share my approach to this in PHP, some of you may found it not an efficient way but this is a 100 better than other available options.
generate a random key and insert it into the table creating a new row.
then you can use that key to retrieve the primary key.
use the update to add data and do other stuff.
doing this way helps to secure a row and have the correct primary key.
I really don't recommend this unless you don't have any other options.

how to uniquely concatenate a value in mysql for a non key field

I'm using a third party mysql table (ie I can't change any of its properties) and I have a row that has id (key), name and value.
I want to store unique cache keys into a row with the name cacheKeys.. and this is my sql statement
$query = "INSERT INTO ".$tableName." (name, value) VALUES ('CacheKeys', '".$key."') ON
DUPLICATE KEY UPDATE value = CONCAT_WS (',', $tableName.value, '$key')";
I've already implemented my caching algorithm, so that every time someone adds a cache key, I check to see if it already exists (from the CacheKeys row above), if it does I fetch it from cache.. otherwise I store it.
Problem is it seems that the sql write operation takes time, and it often stores duplicate cacheKeys
ie: currencies,defaultCurrencyId,user19,currency1,currency1,currency1,currency1,currency1
So I need to check to see that I'm not adding a duplicate key into the cacheKeys field.. and I need to do that using SQL (using php, ie regex etc would just be waaaay to expensive).

Try this::
INSERT INTO tb (firstname, lastname) VALUES ('Jack', 'Doe') IF NOT
EXISTS ( SELECT * FROM tb WHERE firstname='Jack' AND lastname='Doe' );