How to split the name string in mysql?
How to split the name string in mysql ? E.g.: Split the name like firstname,middlename,lastname:
SQL
Oracle error : ORA-00905: Missing keyword
Unless there is a single row in the ASSIGNMENT table and ASSIGNMENT_20081120 is a local PL/SQL variable of type ASSIGNMENT%ROWTYPE, this is not what you want. Assuming you are trying to create a new table and copy the existing data to that new table
IDENTITY_INSERT is set to OFF – How to turn it ON?
Should you instead be setting the identity insert to on within the stored procedure? It looks like you’re setting it to on only when changing the stored procedure, not when actually calling it. Try:
How Stuff and ‘For Xml Path’ work in SQL Server?
Here is how it works: 1. Get XML element string with FOR XML Adding FOR XML PATH to the end of a query allows you to output the results of the query as XML elements, with the element name contained in the PATH argument. For example, if we were to run the following statement: By … Read more
Teradata: how to convert varchar value (format ‘dd.mm.yyyy’) to date (format ‘yyyy-mm-dd’ )?
You need to apply a format during the cast, either Teradata style: or Oracle style: Btw, I added DATE in front of the string, it’s the recommended (and always reliable) way to write a date literal.
ORA-00918: column ambiguously defined in SELECT *
A query’s projection can only have one instance of a given name. As your WHERE clause shows, you have several tables with a column called ID. Because you are selecting * your projection will have several columns called ID. Or it would have were it not for the compiler hurling ORA-00918. The solution is quite simple: you … Read more
How do I escape a single quote in SQL Server?
Single quotes are escaped by doubling them up, just as you’ve shown us in your example. The following SQL illustrates this functionality. I tested it on SQL Server 2008: Results
Drop a temporary table if it exists
From SQL Server 2016 you can just use On previous versions you can use You could also consider truncating the table instead rather than dropping and recreating.
MySQL Cannot Add Foreign Key Constraint
To find the specific error run this: And look in the LATEST FOREIGN KEY ERROR section. The data type for the child column must match the parent column exactly. For example, since medicalhistory.MedicalHistoryID is an INT, Patient.MedicalHistory also needs to be an INT, not a SMALLINT. Also, you should run the query set foreign_key_checks=0 before running the DDL so you can create the tables in an … Read more
How to rename a table in SQL Server?
To rename a table in SQL Server, use the sp_rename command: