I have problem in creation a field name staus which type-BOOLEAN. and length is 1.
When I press the go button then this Massage Arrived
SQL query:
ALTER TABLE `abcd` ADD `status` BOOLEAN( 1 ) BINARY NOT NULL DEFAULT NULL
MySQL said: Documentation
#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 '(1) BINARY NOT NULL DEFAULT NULL' at line 1
I can't solve the problem. I don't know where the error occurring.
Please Help me to solve the problem.
Thank you.
The correct syntax for ALTER TABLE requires COLUMN after ADD
ALTER TABLE `abcd` ADD COLUMN ...
ALTER TABLE `abcd`
ADD COLUMN `status` BIT NOT NULL DEFAULT 0
If you want to create only a single bit field use BIT. You had 2 data types in your statement.
Your default value was null but you don't want to allow that: NOT NULL. Use 0 as default value instead.
For MySQL 5.0.3 and higher, you can use BIT. The manual says:
As of MySQL 5.0.3, the BIT data type is used to store bit-field values. A type of BIT(M) enables storage of M-bit values. M can range from 1 to 64.
Otherwise, according to the MySQL manual you can use bool and boolean which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of zero is considered false. Non-zero values are considered true.
Related
I can't figure out why I can't change a column's data type from TEXT to INT. Here is the script I'm using.
ALTER TABLE covidworlddata.coviddeaths
ALTER COLUMN total_deaths INT;
Error 1366: Incorrect integer value: '' for column 'total_deaths' at row 1 SQL Statement: ALTER TABLE covidworlddata.coviddeaths CHANGE COLUMN total_deaths total_deaths INT(255) NULL DEFAULT NULL
Error Code: 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 'INT' at line 2
Is it because the first row of the csv is the column names (e.g. total_deaths) as seen below?
Source data csv
ALTER COLUMN does not allow to change the datatype. It only allows you to set/drop DEFAULT values and change the visibility of the column. You must use either CHANGE COLUMN or MODIFY COLUMN. See ALTER TABLE Statement.
This problem causes #1064.
Your column which you want to alter have string datatype now and contains empty string as a value. When you modify the column definition the server must convert the datatype for existing values. Empty string cannot be converted to numeric datatype correctly. You must update your table prevously and set the column values to the value which can be converted correctly (for example, this can be '0' or NULL).
This problem causes #1366.
You have a syntax error, so check the syntax. As a minimum you need this
ALTER TABLE covidworlddata.coviddeaths
CHANGE COLUMN total_deaths total_deaths INT;
That's old column name, new column name (which is the same here) and then the rest of the column definition.
Reference: https://dev.mysql.com/doc/refman/8.0/en/alter-table.html
I am getting error for the query:
ALTER TABLE `cms_users` ADD `show_on_web` TINYINT(4) NOT NULL DEFAULT '1';
And i am getting 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 ' NOT NULL DEFAULT '1'' at line 1
I am not sure what the error is.
To verify the Query - http://sqlfiddle.com
You can try below - you need to add column and also default will be 1 not '1' because your data type is tinyint
ALTER TABLE `cms_users`
ADD column `show_on_web` TINYINT(4) NOT NULL DEFAULT 1
Change it to:
ALTER TABLE `cms_users` ADD COLUMN `show_on_web` TINYINT(4) NOT NULL DEFAULT 1;
I've added a COLUMN word and removed quotes of default value.
Because it's TINYINT - Integer, you need to use 1 instead of '1'.
Because '1' is string.
As fa06 posted, you are missing COLUMN after the ADD.
Also, there is a type mismatch with your DEFAULT clause (quotes imply VARCHAR and not TINYINT).
Try this :
ALTER TABLE `cms_users` ADD COLUMN `show_on_web` TINYINT(4) NOT NULL DEFAULT 1;
PS : For some reason, SQLFiddle does not work for me today. However, I juste tried the following :
CREATE TABLE cms_users (
id INT
);
ALTER TABLE `cms_users` ADD COLUMN `show_on_web` TINYINT(4) NOT NULL DEFAULT 1;
on https://paiza.io/en/languages/mysql , and it shows no compilation error.
update amazon-crawler set `flag_images`= '0' where `id`='966'
i get #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 '-crawler set flag_images= '0' where id='966'' at line 1
why syntax error?
amazon-crawler is the table
flag images and id are columns
My guess is that the hyphen in the table name is causing problems, because it is an arithmetic operator. Try also escaping the table name:
UPDATE `amazon-crawler` SET `flag_images`= '0' WHERE `id` = '966';
Note that you should try to avoid using backticks in your query, unless absolutely needed. Using backticks means that any name would potentially work, even one which happens to be a MySQL reserved keyword. Also, I'm guessing that flag_images and id are numeric columns, in which case you should be comparing them against numbers, not strings. So I would write your update as this:
UPDATE `amazon-crawler` SET flag_images= 0 WHERE id = 966;
Here, only the table name has to appear in backticks.
The DEFAULT constraint has no problem in accepting string or current date values. What i need is an constraint that will create an random 4 digit number every time an entity is created. I tried the following code but it returns an syntax error.
ALTER TABLE client_number ADD(code INT(4) DEFAULT FLOOR(RAND()*9999)+1111);
The above statement returns following 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 'floor(rand()*9999)+1111)' at line 1
Need solution.
The documentation is quite clear:
The DEFAULT value clause in a data type specification indicates a
default value for a column. With one exception, the default value must
be a constant; it cannot be a function or an expression.
The expression you have is not a constant, so it doesn't work. You would need to use a trigger instead.
Run the below query
ALTER TABLE table_name ADD field_name INT(4) NOT NULL DEFAULT (rand() * (9999 - 1000) + 1000) AFTER some_feild;
The result gives a random number between 1000-9999
phpmyadmin query not work for single quote / apostrophe.
Not Work
ALTER TABLE 'about_team' CHANGE 'position' 'pp' INT( 11 ) NOT NULL
Work:
ALTER TABLE `about_team` CHANGE `position` `pp` INT( 11 ) NOT NULL
Same query but not work, gives 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 ''about_team' CHANGE 'position' 'pp' INT(11) NOT NULL' at line 1
it is because when you using single quote, it just means it is a STRING. Whereas BACTICK (the second query) means escaping a column.
'about_team' is not equal with `about_team`
'about_team' is STRING
`about_team` is a Table Name
Actually backticks enclosing the names are optional since the names used where not on MySQL Reserved Keyword List.
MySQL Reserved Keywords
Usually, single quotes are used around values while backticks are for table names and column names.