This question already has answers here:
When to use single quotes, double quotes, and backticks in MySQL
(13 answers)
Closed 5 days ago.
I am running this query to update a password field on user with email x#mail.com and want to update his password, but I am having error.
The mysql query:
UPDATE users
SET password=myword
WHERE email=x#mail.com;
The password field is an md5 encrypted field.
The error I got is
#1054 - Unknown column 'myword' in 'field list'
This is my table structure:
the mysql table structure
I tried to put the values in "" and '' as well as `` but still the error occurs.
You must use single quotes for string values.
UPDATE users
SET password='myword'
WHERE email='x#mail.com';
Double quotes are used for quoting table and column names with special characters and the like.
Related
This question already has answers here:
When to use single quotes, double quotes, and backticks in MySQL
(13 answers)
Closed 4 months ago.
This line of code is no working, and I cannot for the life of me figure out what is wrong with it.
INSERT INTO teacher (email,password,admin) VALUES (deborah68#example.org,d%6AsQPq7y,1);
this wont run and says the error is near the end of the line
any help is appreciated, the schema is called at3
Why are you not enclosing the string/char data in single quotes ? Assuming they are of datatype varchar, you simply enclose them in single quotes and the command will work.
INSERT INTO teacher (email,password,admin) VALUES ('deborah68#example.org','d%6AsQPq7y',1)
Assuming your email and password are datatype of varchar, try putting '' between the values, or better you can use parameterized value if it's any backend code, try:
INSERT INTO teacher (email,password,admin) VALUES ('deborah68#example.org','d%6AsQPq7y',1);
This question already has answers here:
When to use single quotes, double quotes, and backticks in MySQL
(13 answers)
Closed 2 years ago.
I don't know why I can't use where clause in this project, it shows up throwing Error Code: 1054.
in this case :Error Code: 1054. Unknown column '15/05/20' in 'where clause'
select * from covid_19_india;
select `state/unionterritory`,
cured, cured, confirmed,
round(deaths/confirmed)*100 as mortality_rate
from covid_19_india
where date = `15/05/20`;
Here is the file I have imported data from the below file...
try the following, put date between ' ' as single quote is the delimiter for the string and it denotes textual data.
Backticks and regular quotes have different meanings in SQL. Quotes (single or double) indicate a literal string, whereas backticks are quoted identifiers.
select `state/unionterritory`,
cured, cured, confirmed,
round(deaths/confirmed)*100 as mortality_rate
from covid_19_india
where date = '15/05/20';
You use backticks ` to quote your 15/05/20, and as of that it becomes an identifier, and is not handled as value. So the database is looking for the column with the name 15/05/20 (like with your state/unionterritory column)
You need to change the quoted to ' (where date = '15/05/20')
This question already has an answer here:
How to escape value keyword in mysql while using Select statement
(1 answer)
Closed 3 years ago.
I have to access a MySQL database that looks like this:
LOG_ID KEY TARGET CREATOR
1 okaytest 297d09d5-55fe faec09c0-159e
I can do the following query:
SELECT * FROM DATABASE WHERE LOG_ID=1
This would return me the column correctly.
But I can't do the following query.
SELECT * FROM DATABASE WHERE KEY='okaytest'
I believe that there might be a problem with the word KEY being a reserved keyword in MySQL, but I have to access that specific database, I can't change it's name and I must select it from the key
try like below by using the backtick `
SELECT * FROM DATABASE WHERE `KEY`='okaytest'
actually for reserve word you have to use this backtick otherwise it will thorow error here is the reserve word list
another options better not to use reserve word or incase of necessary you have use it by using backtick
This question already has an answer here:
Syntax error due to using a reserved word as a table or column name in MySQL
(1 answer)
Closed 8 years ago.
I just realized that i assigned a table name as "AS" and when i was trying to do a select query, i kept getting an 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 '"as"'.
So i looked up for reserved words and found out that "AS" is reserved. Well, i think i knew before (used for aliases) but just didn't consider it.
So to fix this will easily be to rename the table name. But assuming i don't want to, can i still access this table using some sort of symbol ? i tried putting it in quotes and double quotes but no success.
With mysql, you can wrap reserved words (or any words for that matter) in backticks to cause word to be parsed as a literal name rather than the keyword:
select * from `AS`
Read more about it in the on line documentation under "identifier quote character".
Yes use this(backtiks):
SELECT * FROM `as`
You should use backticks. Else MySQL will consider it as a Keyword. If we use backtick then they are called quoted identifiers and they tell the parser to handle the text between them as a literal string. They are useful for when you have a column or table that contains a keyword or space.
Please refer: http://dev.mysql.com/doc/refman/5.6/en/reserved-words.html
This question already has answers here:
Syntax error due to using a reserved word as a table or column name in MySQL
(1 answer)
When to use single quotes, double quotes, and backticks in MySQL
(13 answers)
Closed 8 years ago.
I have a table like this:
Why is this command not working:
UPDATE 'stitch' SET 'claim-time'='20' WHERE 'group'='010000'
I get the error:
#1064 - 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 ''stitch' SET claim-time='20' WHERE group='010000'' at line 1
Everything in the table is text.
group is a reserved keyword in mysql so use backticks to escape it
`group`
Also you are selecting the string as column name, correct format is
UPDATE `stitch` SET `claim-time`='20' WHERE `group`='010000'
Try removing the single quotes from stitch, claim-time and group. Either leave them out or use backquote `. The comma is used for strings, not table and field names.
Also, I don't know what data type claim-time and group are. If they are numeric (int, bigint, etc) and not string (varchar, text, etc) then you'll need to remove the single quotes from those too.
update stitch set claim-time=20 where group='0100000'; # assuming group is a string data type
Try this.
UPDATE TableName SET claim-time='20' WHERE group='010000';
That is considering if claim-time is a varchar datatype. If it's a number just remove the quotes.
Remember to avoid reserved names such as field names such as name, password, group, user and stuff just to be safe. Make it user1, group1 instead or something like these.