Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I wrote the following query for mySQL :
mysql> Create table R_Matrix
(
image_name VARCHAR(25) NOT NULL REFERENCES Images(image_name),
Row INT,
Column INT,
Data INT,
PRIMARY KEY(image_name)
);
Where Images is a table in the same database and image_name is a column in it;
However I got the following error :
ERROR 1064 (42000): You have an error in your SQL syntax; check the
manual that corresponds to your MySQL server version for the right
syntax to use near 'Column INT, Data INT, PRIMARY KEY(image_name) )'
at line 1
I cannot find anything wrong with the query. What am I doing wrong ?
COLUMN is a reserved keyword. It must be escape using backtick,
Create table R_Matrix
(
image_name VARCHAR(25) NOT NULL REFERENCES Images(image_name),
Row INT,
`Column` INT,
Data INT,
PRIMARY KEY(image_name)
);
MySQL Reserved Keywords
The best option is to avoid using MySQL reserved words as identifiers. Since you are running a CREATE TABLE statement, changing the column name is the best solution. (Choose a different column name; or at a minimum, add an underscore to the end of the identifier.)
The problem with your statement (as JW correctly points out), is that COLUMN is a MySQL reserved word. Your statement is raising an error because MySQL is interpreting the token Column in your statement as a reserved word, rather than a column name; and, in that context, that reserved word is valid syntax.
A workaround (as JW also points out) to prevent MySQL as seeing that identifier as a reserved word is to enclose the identifier in backticks; alternatively, if sql_mode is set to ANSI, the identifier can be enclosed in double quotes.
Related
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 days ago.
Improve this question
I'm a beginner at mysql on linux (ubuntu 22.4), while checking a document with the basics i came across an example of how to create a primary key, but with the constraint keyword:
CREATE TABLE
Empleados (
IdEmpleado INTEGER CONSTRAINT IndicePrimario PRIMARY,
Nombre TEXT,
Apellidos TEXT,
FechaNacimiento DATETIME
)
But when i type the command, i get this error.
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'CONSTRAINT indice PRIMARY KEY)' at line 1
I tried some modifications such as "int" instead of integer, or "primary key" instead of just primary, adding "not null" and so on, but is still the same error.
I already tried to search why is it wrong, but can't figure it out. If anyone could help, id appreciate
Try adding constraint separately as shown below,
CREATE TABLE Empleados (
IdEmpleado int NOT NULL,
Nombre varchar(255),
Apellidos varchar(255),
FechaNacimiento datetime,
CONSTRAINT IndicePrimario PRIMARY KEY (IdEmpleado)
);
This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions.
I'm trying to execute a simple MySQL query as below:
INSERT INTO user_details (username, location, key)
VALUES ('Tim', 'Florida', 42)
But I'm getting the following error:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key) VALUES ('Tim', 'Florida', 42)' at line 1
How can I fix the issue?
The Problem
In MySQL, certain words like SELECT, INSERT, DELETE etc. are reserved words. Since they have a special meaning, MySQL treats it as a syntax error whenever you use them as a table name, column name, or other kind of identifier - unless you surround the identifier with backticks.
As noted in the official docs, in section 10.2 Schema Object Names (emphasis added):
Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, and other object names are known as identifiers.
...
If an identifier contains special characters or is a reserved word, you must quote it whenever you refer to it.
...
The identifier quote character is the backtick ("`"):
A complete list of keywords and reserved words can be found in section 10.3 Keywords and Reserved Words. In that page, words followed by "(R)" are reserved words. Some reserved words are listed below, including many that tend to cause this issue.
ADD
AND
BEFORE
BY
CALL
CASE
CONDITION
DELETE
DESC
DESCRIBE
FROM
GROUP
IN
INDEX
INSERT
INTERVAL
IS
KEY
LIKE
LIMIT
LONG
MATCH
NOT
OPTION
OR
ORDER
PARTITION
RANK
REFERENCES
SELECT
TABLE
TO
UPDATE
WHERE
The Solution
You have two options.
1. Don't use reserved words as identifiers
The simplest solution is simply to avoid using reserved words as identifiers. You can probably find another reasonable name for your column that is not a reserved word.
Doing this has a couple of advantages:
It eliminates the possibility that you or another developer using your database will accidentally write a syntax error due to forgetting - or not knowing - that a particular identifier is a reserved word. There are many reserved words in MySQL and most developers are unlikely to know all of them. By not using these words in the first place, you avoid leaving traps for yourself or future developers.
The means of quoting identifiers differs between SQL dialects. While MySQL uses backticks for quoting identifiers by default, ANSI-compliant SQL (and indeed MySQL in ANSI SQL mode, as noted here) uses double quotes for quoting identifiers. As such, queries that quote identifiers with backticks are less easily portable to other SQL dialects.
Purely for the sake of reducing the risk of future mistakes, this is usually a wiser course of action than backtick-quoting the identifier.
2. Use backticks
If renaming the table or column isn't possible, wrap the offending identifier in backticks (`) as described in the earlier quote from 10.2 Schema Object Names.
An example to demonstrate the usage (taken from 10.3 Keywords and Reserved Words):
mysql> CREATE TABLE interval (begin INT, end INT);
ERROR 1064 (42000): You have an error in your SQL syntax.
near 'interval (begin INT, end INT)'
mysql> CREATE TABLE `interval` (begin INT, end INT);
Query OK, 0 rows affected (0.01 sec)
Similarly, the query from the question can be fixed by wrapping the keyword key in backticks, as shown below:
INSERT INTO user_details (username, location, `key`)
VALUES ('Tim', 'Florida', 42)"; ^ ^
This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions.
I'm trying to execute a simple MySQL query as below:
INSERT INTO user_details (username, location, key)
VALUES ('Tim', 'Florida', 42)
But I'm getting the following error:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key) VALUES ('Tim', 'Florida', 42)' at line 1
How can I fix the issue?
The Problem
In MySQL, certain words like SELECT, INSERT, DELETE etc. are reserved words. Since they have a special meaning, MySQL treats it as a syntax error whenever you use them as a table name, column name, or other kind of identifier - unless you surround the identifier with backticks.
As noted in the official docs, in section 10.2 Schema Object Names (emphasis added):
Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, and other object names are known as identifiers.
...
If an identifier contains special characters or is a reserved word, you must quote it whenever you refer to it.
...
The identifier quote character is the backtick ("`"):
A complete list of keywords and reserved words can be found in section 10.3 Keywords and Reserved Words. In that page, words followed by "(R)" are reserved words. Some reserved words are listed below, including many that tend to cause this issue.
ADD
AND
BEFORE
BY
CALL
CASE
CONDITION
DELETE
DESC
DESCRIBE
FROM
GROUP
IN
INDEX
INSERT
INTERVAL
IS
KEY
LIKE
LIMIT
LONG
MATCH
NOT
OPTION
OR
ORDER
PARTITION
RANK
REFERENCES
SELECT
TABLE
TO
UPDATE
WHERE
The Solution
You have two options.
1. Don't use reserved words as identifiers
The simplest solution is simply to avoid using reserved words as identifiers. You can probably find another reasonable name for your column that is not a reserved word.
Doing this has a couple of advantages:
It eliminates the possibility that you or another developer using your database will accidentally write a syntax error due to forgetting - or not knowing - that a particular identifier is a reserved word. There are many reserved words in MySQL and most developers are unlikely to know all of them. By not using these words in the first place, you avoid leaving traps for yourself or future developers.
The means of quoting identifiers differs between SQL dialects. While MySQL uses backticks for quoting identifiers by default, ANSI-compliant SQL (and indeed MySQL in ANSI SQL mode, as noted here) uses double quotes for quoting identifiers. As such, queries that quote identifiers with backticks are less easily portable to other SQL dialects.
Purely for the sake of reducing the risk of future mistakes, this is usually a wiser course of action than backtick-quoting the identifier.
2. Use backticks
If renaming the table or column isn't possible, wrap the offending identifier in backticks (`) as described in the earlier quote from 10.2 Schema Object Names.
An example to demonstrate the usage (taken from 10.3 Keywords and Reserved Words):
mysql> CREATE TABLE interval (begin INT, end INT);
ERROR 1064 (42000): You have an error in your SQL syntax.
near 'interval (begin INT, end INT)'
mysql> CREATE TABLE `interval` (begin INT, end INT);
Query OK, 0 rows affected (0.01 sec)
Similarly, the query from the question can be fixed by wrapping the keyword key in backticks, as shown below:
INSERT INTO user_details (username, location, `key`)
VALUES ('Tim', 'Florida', 42)"; ^ ^
This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions.
I'm trying to execute a simple MySQL query as below:
INSERT INTO user_details (username, location, key)
VALUES ('Tim', 'Florida', 42)
But I'm getting the following error:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key) VALUES ('Tim', 'Florida', 42)' at line 1
How can I fix the issue?
The Problem
In MySQL, certain words like SELECT, INSERT, DELETE etc. are reserved words. Since they have a special meaning, MySQL treats it as a syntax error whenever you use them as a table name, column name, or other kind of identifier - unless you surround the identifier with backticks.
As noted in the official docs, in section 10.2 Schema Object Names (emphasis added):
Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, and other object names are known as identifiers.
...
If an identifier contains special characters or is a reserved word, you must quote it whenever you refer to it.
...
The identifier quote character is the backtick ("`"):
A complete list of keywords and reserved words can be found in section 10.3 Keywords and Reserved Words. In that page, words followed by "(R)" are reserved words. Some reserved words are listed below, including many that tend to cause this issue.
ADD
AND
BEFORE
BY
CALL
CASE
CONDITION
DELETE
DESC
DESCRIBE
FROM
GROUP
IN
INDEX
INSERT
INTERVAL
IS
KEY
LIKE
LIMIT
LONG
MATCH
NOT
OPTION
OR
ORDER
PARTITION
RANK
REFERENCES
SELECT
TABLE
TO
UPDATE
WHERE
The Solution
You have two options.
1. Don't use reserved words as identifiers
The simplest solution is simply to avoid using reserved words as identifiers. You can probably find another reasonable name for your column that is not a reserved word.
Doing this has a couple of advantages:
It eliminates the possibility that you or another developer using your database will accidentally write a syntax error due to forgetting - or not knowing - that a particular identifier is a reserved word. There are many reserved words in MySQL and most developers are unlikely to know all of them. By not using these words in the first place, you avoid leaving traps for yourself or future developers.
The means of quoting identifiers differs between SQL dialects. While MySQL uses backticks for quoting identifiers by default, ANSI-compliant SQL (and indeed MySQL in ANSI SQL mode, as noted here) uses double quotes for quoting identifiers. As such, queries that quote identifiers with backticks are less easily portable to other SQL dialects.
Purely for the sake of reducing the risk of future mistakes, this is usually a wiser course of action than backtick-quoting the identifier.
2. Use backticks
If renaming the table or column isn't possible, wrap the offending identifier in backticks (`) as described in the earlier quote from 10.2 Schema Object Names.
An example to demonstrate the usage (taken from 10.3 Keywords and Reserved Words):
mysql> CREATE TABLE interval (begin INT, end INT);
ERROR 1064 (42000): You have an error in your SQL syntax.
near 'interval (begin INT, end INT)'
mysql> CREATE TABLE `interval` (begin INT, end INT);
Query OK, 0 rows affected (0.01 sec)
Similarly, the query from the question can be fixed by wrapping the keyword key in backticks, as shown below:
INSERT INTO user_details (username, location, `key`)
VALUES ('Tim', 'Florida', 42)"; ^ ^
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 6 years ago.
Improve this question
I'm trying but failing to create a table using Eclipse.
What can I do to fix this?
PreparedStatement create=conn.prepareStatement("CREATE TABLE IF NOT EXISTS
stud(id int unsigned not null auto_increment,
firstname varchar(25),
lastname varchar(25)");
error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[IF NOT EXISTS] stud(id int unsigned not null auto_increment, firstname varchar(' at line 1
The issue is that your query for the table creation is missing a close bracket at the end, which makes the query syntactically invalid. The query should be:
PreparedStatement create=conn.prepareStatement("CREATE TABLE IF NOT EXISTS
stud(id int unsigned not null auto_increment,
firstname varchar(25),
lastname varchar(25))");
In my opinion, code formatting so brackets/braces and other general syntax can line up help to avoid these situations as you can see the opens and closes lining up:
PreparedStatement create=conn.prepareStatement("CREATE TABLE IF NOT EXISTS
stud(
id int unsigned not null auto_increment,
firstname varchar(25),
lastname varchar(25)
)");
However, some coding guidelines might not allow you to do this.
Although everybody is picking the missing parenthesis up, however, the error message does not relate to a missing parenthesis and ever answer and comment ignores what's in the error message.
I belive that the OP did not copy the exact code that is being executed because the error message says:
...check the manual that corresponds to your MySQL server version for the right syntax to use near '[IF NOT EXISTS]
Note that in the error message the if not exists clause is enclosed by square brackets as in the mysql manual on create table. In the manual it indicates that this clause is optional, but in the real life code the square brackets must not be there.
In the actual code there are no square brackets, this is why I belive that the OP did not copy the original code into the question. My answer is: remove the square brackets around the if not exists clause.
It simply lacks a closing paranthesis, as far as I can tell.
PreparedStatement create=conn.prepareStatement("CREATE TABLE IF NOT EXISTS
stud(id int unsigned not null auto_increment,
firstname varchar(25),
lastname varchar(25))");