Get current year in TSQL
Yes, it’s remarkably easy in fact:
SQL
The used SELECT statements have a different number of columns
Put the columns names explicitly rather than *, and make sure the number of columns and data types match for the same column in each select. Update: I really don’t think you want to be UNIONing those tables, based on the tables names. They don’t seem to contain related data. If you post your schema … Read more
mysql update column with value from another table
In addition to this answer if you need to change tableB.value according to tableA.value dynamically you can do for example:
MySQL equivalent of DECODE function in Oracle
You can use IF() where in Oracle you would have used DECODE().
Subtract one day from datetime
Try this OR
Check if MySQL table exists without using “select from” syntax?
If you want to be correct, use INFORMATION_SCHEMA. Alternatively, you can use SHOW TABLES If there is a row in the resultset, table exists.
SQL conditional SELECT
Sounds like they want the ability to return only allowed fields, which means the number of fields returned also has to be dynamic. This will work with 2 variables. Anything more than that will be getting confusing. Dynamic SQL will help with multiples. This examples is assuming atleast 1 column is true.
Regex pattern inside SQL Replace function?
You can use PATINDEX to find the first index of the pattern (string’s) occurrence. Then use STUFF to stuff another string into the pattern(string) matched. Loop through each row. Replace each illegal characters with what you want. In your case replace non numeric with blank. The inner loop is if you have more than one … Read more
Best way to test if a row exists in a MySQL table
You could also try EXISTS: and per the documentation, you can SELECT anything. Traditionally, an EXISTS subquery starts with SELECT *, but it could begin with SELECT 5 or SELECT column1 or anything at all. MySQL ignores the SELECT list in such a subquery, so it makes no difference.
Update statement with inner join on Oracle
That syntax isn’t valid in Oracle. You can do this: Or you might be able to do this: It depends if the inline view is considered updateable by Oracle ( To be updatable for the second statement depends on some rules listed here ).