I am trying to run the query:
ALTER IGNORE TABLE test_table DROP PRIMARY KEY, ADD PRIMARY KEY(id);
test_table is just a temporary table I'm using for testing purposes, and id is a column in it.
The query works fine without the "IGNORE" key word, but when I add it I get the error message:
"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 'IGNORE TABLE test_table ADD PRIMARY KEY(id)' at line 1"
How do I fix this? Or how can I run that query and ignore any errors that might occur? Thanks!
As of MySQL 5.7.4, the IGNORE clause for ALTER TABLE is removed and its use produces an error. Please check your version
Related
I have created a table and In table i have a column "city" , i did the type of column as Unique ,but now i don't need it as unique . i want to edit it because i want to insert the same name of city but i couldnt do it.
Error Code: 1062. Duplicate entry 'istanbul' for key 'ilAdı'
I tried to change it from here but i get this error.
"
Operation failed: There was an error while applying the SQL script to the database.
Executing:
ALTER TABLE hotel.müşteriler
;
ALTER TABLE hotel.müşteriler ALTER INDEX ilAdı VISIBLE;
ERROR 1064: 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 'INDEX ilAdı VISIBLE' at line 1
SQL Statement:
ALTER TABLE hotel.müşteriler ALTER INDEX ilAdı VISIBLE "
You can write the query for removing the unique key from the column like this:
alter table "your table name" drop index "the name of the column";
the quotations are not need.
this will remove the unique key from the column.
I try to fix some error in Jira as mention in this page but when I try to run an SQL query, I got the below 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 'CONSTRAINT
fk_ao_8542f1_ifj_obj_attr_val_object_attribute_id' at line 1
My Query is:
ALTER TABLE AO_8542F1_IFJ_OBJ_ATTR_VAL
DROP CONSTRAINT `fk_ao_8542f1_ifj_obj_attr_val_object_attribute_id`
How I can fix this Query? I use MySQL version 5.7
Drop MySQL foreign key constraints
To drop a foreign key constraint, you use the ALTER TABLE statement:
ALTER TABLE table_name
DROP FOREIGN KEY constraint_name;
Judging by the name of the constraint, I believe it's a foreign key and MySQL has a different approach to drop foreign keys:
ALTER TABLE AO_8542F1_IFJ_OBJ_ATTR_VAL
DROP FOREIGN KEY `fk_ao_8542f1_ifj_obj_attr_val_object_attribute_id`
I am implementing a check constraint on a column such that the inserted value is always a multiple of 11, which is below:
create table multinum(empid int(4) primary key, check (empid%11==0));
But I am getting the 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 '==0))' at line 1
So I removed one equal operator but now it is accepting those values as well that are not multiple of 11, like 12.
What is the problem in my statement? Is there any other way of doing this?
EDIT
I also tried below statement, but to no effect:
create table multinum(empid int(4) primary key check (empid%11==0));
IT works just fine.
Copy the text from the example and try it in your database
CHECK constraints only work with mysql 8 prior versions didn't implement it completely.
create table multinum(empid int(4) primary key, check (empid%11=0));
✓
INSERT INTO multinum VALUES(10);
Check constraint 'multinum_chk_1' is violated.
INSERT INTO multinum VALUES(11);
✓
INSERT INTO multinum VALUES(22);
✓
INSERT INTO multinum VALUES(12);
Check constraint 'multinum_chk_1' is violated.
db<>fiddle here
I'm working through the head first SQL book using MySQL and am encountering an error when trying to run the code in the book. I'm sure the error is very obvious but it has me stumped. The idea is to add a primary key to the table project_list by changing the name of a current column and setting it as a primary key.
ALTER TABLE project_list
CHANGE COLUMN number proj_id INT NOT NULL AUTO_INCREMENT,
ADD PRIMARY KEY ('proj_id');
Error message:
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 ''proj_id')' at line 3.
ADD PRIMARY KEY ('proj_id')
is attempting to set the primary key to a literal string rather than a column. You should either use proj_id on it's own:
... ADD PRIMARY KEY (proj_id);
or the back-tick version (with ` rather than '):
... ADD PRIMARY KEY (`proj_id`);
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 'BIT)' at line 1
SQL:
CREATE TABLE Clients (ID nvarchar(36), Primary BIT)
I have also tried bit(1) and tinyint(1). any Ideas?
the word 'Primary' is reserved for indicating whether a column is a primary key. You need to pick a different column name.
Missing semi colon at the end.