https://www.postgresql.org/docs/current/static/sql-createrole.html These clauses determine whether the new role is a “superuser”, who can override all access restrictions within the database. yes – all privileges in all databases on the specified cluster
I have the below error when I execute the following script. What is the error about, and how it can be resolved? Error: Server: Msg 544, Level 16, State 1, Line 1 Cannot insert explicit value for identity column in table ‘table’ when IDENTITY_INSERT is set to OFF.
SELECT DISTINCT <insert all columns but the PK here> FROM foo. Create a temp table using that query (the syntax varies by RDBMS but there’s typically a SELECT … INTO or CREATE TABLE AS pattern available), then blow away the old table and pump the data from the temp table back into it.
It’s better to use either of the following: The first alternative should give you no result or one result, the second count should be zero or one. How old is the documentation you’re using? Although you’ve read good advice, most query optimizers in recent RDBMS’s optimize SELECT COUNT(*) anyway, so while there is a difference … Read more
What is the complete list of all special characters for a SQL (I’m interested in SQL Server but other’s would be good too) LIKE clause? E.g. SQL Server: % _ [specifier] E.g. [a-z] [^specifier] ESCAPE clause E.g. %30!%%’ ESCAPE ‘!’ will evaluate 30% as true ‘ characters need to be escaped with ‘ E.g. they’re … Read more
Try doing this:
you can join both tables even on UPDATE statements, SQLFiddle Demo for faster performance, define an INDEX on column marks on both tables. using SUBQUERY SQLFiddle Demo
Using LIKE:
Starting SQL SERVER 2005, you can do this… or something like this for 2000 and below versions…
Yes. You need to use the “Searched” form rather than the “Simple” form of the CASE expression