So it will return anycodings_sql those kind of error. While its running it will anycodings_sql search for the reference table but anycodings_sql tables are not there. I tried to anycodings_sql create table with primary key and also anycodings_sql foreign key. My mistake is in the sequence order of anycodings_sql execution in my sql files. I just wrote the above lines in anycodings_sql Create.batand run the bat file. Mysql -uroot -padmin sampdb < E:\important\sampdb\load_absence.sql Mysql -uroot -padmin sampdb < E:\important\sampdb\load_student.sql Mysql -uroot -padmin sampdb < E:\important\sampdb\insert_absence.sql Mysql -uroot -padmin sampdb < E:\important\sampdb\insert_student.sql Mysql -uroot -padmin sampdb < E:\important\sampdb\create_absence.sql
Mysql -uroot -padmin sampdb < E:\important\sampdb\create_student.sql mysql -uroot -padmin < E:\important\sampdb\createdb.sql I faced this kind of issue while anycodings_sql creating DB from the textfile. If you anycodings_sql really have a foreign-key problem, it anycodings_sql would show up to you by the line where anycodings_sql you will enable the checks again - this anycodings_sql will fail then. but i can anycodings_sql deal with it :) Just add these two lines anycodings_sql of SQL around your fucky statement: SET FOREIGN_KEY_CHECKS = 0 i mean, the anycodings_sql server is "empty" for the current user anycodings_sql and i still get this error? Sorry but i anycodings_sql guess MySQL is lying to me. and the anycodings_sql sql-user i'm using has no access to any anycodings_sql other db's on the server.
why? i mean, anycodings_sql there is no database anymore. but in my case, i have anycodings_sql just dropped the whole database, and i anycodings_sql still get the error. Sometimes MySQL is just super stupid - i anycodings_sql can understand the reason cause of anycodings_sql foreign-keys.
This can bite you if you go from anycodings_sql one server to another that have anycodings_sql different case handling rules. In case you get an errno 121, here are a anycodings_sql couple of causes:ġ) The constraint name you chose is anycodings_sql already takenĢ) On some systems if there is a case anycodings_sql difference in your statement and table anycodings_sql names. Note that anycodings_sql MySQL (unless you tweak it) has a anycodings_sql maximum single column key length of 767 anycodings_sql bytes (this corresponds to a anycodings_sql varchar(255) UTF column) Check spelling (and anycodings_sql perhaps a space at the beginning or end anycodings_sql of column)ħ) One of the indexes on one of the anycodings_sql columns is incomplete, or the column is anycodings_sql too long for a complete index. You need SUPER anycodings_sql privileges to run it, so if you don't anycodings_sql have that, you'll just have to test out anycodings_sql the following scenarios.ġ) Data Types Don't Match: The types of anycodings_sql the columns have to be the sameĢ) Parent Columns Not Indexed (Or anycodings_sql Indexed in Wrong Order)ĥ) Table Collations Don't Match: even if anycodings_sql the column collations match, on some anycodings_sql MySQL versions this can be a problem.Ħ) Parent Column Doesn't Actually Exist anycodings_sql In Parent Table. Under that it will anycodings_sql give you a very helpful error message, anycodings_sql which typically will tell you right away anycodings_sql what is the matter. There are quite a few things that can anycodings_sql cause errno 150, so for people searching anycodings_sql this topic, here is what I think is a anycodings_sql close to exhaustive list (source Causes anycodings_sql of Errno 150):įor errno 150 or errno 121, simply anycodings_sql typing in SHOW ENGINE INNODB STATUS, anycodings_sql there is a section called "LATEST anycodings_sql FOREIGN KEY ERROR".