About this question
rror: Code 1054. Unknown column 'U2.id_naslov' in 'field list' gets thrown on this simple query in MySQL Workbench:
UPDATE krneki_1 AS U1, krneki_2 AS U2
SET U1.id_naslov = U2.id_naslov
WHERE (U2.id_zaposlen = U1.id_naslovi_zaposleni)
I have searched and read other posts on the net but nothing helps...
I guess it's a trivial solution but I just can't see it.
This kind of error never came up on TSQL (sql server).
Table krneki_2 was created by Mysql workbench via data import (create new table) later on when this error occurred I also altered the number fields to smallint just to see if it helps... but... nothing.
Result of SHOW CREATE TABLE krneki_2:
Table: krneki_2
Create Table: CREATE TABLE `krneki_2`
( `id` smallint(6) NOT NULL AUTO_INCREMENT,
`id_naslov` smallint(6) NOT NULL,
`id_zaposlen` smallint(6) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB AUTO_INCREMENT=204 DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
Result of SHOW CREATE TABLE krneki_1:
Table: krneki_1
Create Table: CREATE TABLE `krneki_1` (
`id_naslovi_zaposleni` smallint(6) NOT NULL AUTO_INCREMENT,
`id_naslov` smallint(6) DEFAULT NULL,
`id_zaposleni` smallint(6) DEFAULT NULL,
`id_aktiven` tinyint(4) DEFAULT '0',
`cas_vnosa` datetime DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id_naslovi_zaposleni`)
) ENGINE=InnoDB AUTO_INCREMENT=256 DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
Results from information_schema, specifically from this query suggested in comments:
select
table_catalog, table_schema, table_name, column_name, ordinal_position
from information_schema.columns
where table_name like '%krneki_1%' and column_name like '%naslov%' ;
Results for krneki_1 and naslov:
+---------------+--------------+-------------+----------------------+------------------+
| table_catalog | table_schema | table_name | column_name | ordinal_position |
+---------------+--------------+-------------+----------------------+------------------+
| def | hq_db | krneki_1 | id_naslovi_zaposleni | 1 |
| def | hq_db | krneki_1 | id_naslov | 2 |
+---------------+--------------+-------------+----------------------+------------------+
2 rows in set (0.00 sec)
Results for krneki_2 and naslov:
+---------------+--------------+-------------+--------------+------------------+
| table_catalog | table_schema | table_name | column_name | ordinal_position |
+---------------+--------------+-------------+--------------+------------------+
| def | hq_db | krneki_2 | id_naslov | 2 |
+---------------+--------------+-------------+--------------+------------------+
1 row in set (0.00 sec)
Results for krneki_2 and zaposlen:
+---------------+--------------+-------------+--------------+------------------+
| table_catalog | table_schema | table_name | column_name | ordinal_position |
+---------------+--------------+-------------+--------------+------------------+
| def | hq_db | krneki_2 | id_zaposlen | 3 |
+---------------+--------------+-------------+--------------+------------------+
1 row in set (0.00 sec)
Further digging, as suggested:
select
table_catalog, table_schema, table_name, column_name, ordinal_position,
char_length(column_name) as cl, length(column_name) as l
from information_schema.columns
where table_name = 'krneki_2' ;
Results for krneki_2
Results for krneki_2:
+-------------+------------+----------+-----------+----------------+---+---+-------------+
|table_catalog|table_schema|table_name|column_name|ordinal_position| cl| l | column_type |
+-------------+------------+----------+-----------+----------------+---+---+-------------+
| def | hq_db | krneki_2 |id | 1 | 2| 2| smallint(6) |
| def | hq_db | krneki_2 |id_naslov | 2 | 10| 12| smallint(6) |
| def | hq_db | krneki_2 |id_zaposlen| 3 | 11| 11| smallint(6) |
+-------------+------------+----------+-----------+----------------+---+---+-------------+
3 rows in set (0.00 sec)
Results for krneki_1:
+-------------+------------+----------+--------------------+----------------+--+--+-----------+
|table_catalog|table_schema|table_name| column_name |ordinal_position|cl| l|column_type|
+-------------+------------+----------+--------------------+----------------+--+--+-----------+
| def | hq_db | krneki_1 |id_naslovi_zaposleni| 1 |20|20|smallint(6)|
| def | hq_db | krneki_1 |id_naslov | 2 | 9| 9|smallint(6)|
| def | hq_db | krneki_1 |id_zaposleni | 3 |12|12|smallint(6)|
| def | hq_db | krneki_1 |id_aktiven | 4 |10|10|tinyint(4) |
| def | hq_db | krneki_1 |cas_vnosa | 5 | 9| 9|datetime |
+-------------+------------+----------+--------------------+----------------+--+--+-----------+
5 rows in set (0.00 sec)
krneki_2 with HEX:
+-------------+------------+----------+-----------+----------------+--+--+-------------------------+
|table_catalog|table_schema|table_name|column_name|ordinal_position|cl|l | hex |
+-------------+------------+----------+-----------+----------------+--+--+-------------------------+
| def | hq_db | krneki_2 |id | 1 | 2| 2|6964 |
| def | hq_db | krneki_2 |id_naslov | 2 |10|12|EFBBBF69645F6E61736C6F76 |
| def | hq_db | krneki_2 |id_zaposlen| 3 |11|11|69645F7A61706F736C656E |
+-------------+------------+----------+-----------+----------------+--+--+-------------------------+
3 rows in set (0.00 sec)
krneki_1 with HEX:
+-------------+------------+----------+--------------------+----------------+--+--+----------------------------------------+
|table_catalog|table_schema|table_name|column_name |ordinal_position|cl| l|hex |
+-------------+------------+----------+--------------------+----------------+--+--+----------------------------------------+
| def | hq_db | krneki_1 |id_naslovi_zaposleni| 1 |20|20|69645F6E61736C6F76695F7A61706F736C656E69|
| def | hq_db | krneki_1 |id_naslov | 2 | 9| 9|69645F6E61736C6F76 |
| def | hq_db | krneki_1 |id_zaposleni | 3 |12|12|69645F7A61706F736C656E69 |
| def | hq_db | krneki_1 |id_aktiven | 4 |10|10|69645F616B746976656E |
| def | hq_db | krneki_1 |cas_vnosa | 5 | 9| 9|6361735F766E6F7361 |
+-------------+------------+----------+--------------------+----------------+--+--+----------------------------------------+
5 rows in set (0.00 sec)
