Syntax strictly depends on which SQL DBMS you’re using. Here are some ways to do it in ANSI/ISO (aka should work on any SQL DBMS), MySQL, SQL Server, and Oracle. Be advised that my suggested ANSI/ISO method will typically be much slower than the other two methods, but if you’re using a SQL DBMS other … Read more
SQLFiddle will let you test out your queries, while it doesn’t explicitly correct syntax etc. per se it does let you play around with the script and will definitely let you know if things are working or not.
I always default to NOT EXISTS. The execution plans may be the same at the moment but if either column is altered in the future to allow NULLs the NOT IN version will need to do more work (even if no NULLs are actually present in the data) and the semantics of NOT IN if NULLs are present are unlikely to be the ones you … Read more
Rather slow, but working method to include any of words: If you need all words to be present, use this: If you want something faster, you need to look into full text search, and this is very specific for each database type.
Sample DDL Make sure that the table is deleted after use
From @gmmastros’s answer Whenever you see the message…. string or binary data would be truncated Think to yourself… The field is NOT big enough to hold my data. Check the table structure for the customers table. I think you’ll find that the length of one or more fields is NOT big enough to hold the data … Read more
Combine the creation and insert into a single statement: If it doesn’t create the table, AS SELECT … clause is ignored.
Open and edit /etc/my.cnf or /etc/mysql/my.cnf, depending on your distribution. Add skip-grant-tables under [mysqld] Restart MySQL You should be able to log in to MySQL now using the below command mysql -u root -p Run mysql> flush privileges; Set new password by ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘NewPassword’; Go back to /etc/my.cnf and remove/comment skip-grant-tables Restart MySQL Now you will be able to login with the … Read more
Works fine for me in 5.0.27 I just get a warning (not an error) that the table exists;