The biggest misconception with solar covers or rings is that they are meant to heat the pool. While these products may raise the pool temperature, they do so by reducing heat loss (mainly at night). Solar blankets should not be left on a pool during daylight hours, and at the very least, they should be removed for a 4-8 hours during the day for the pool to breathe.
ALTER DATABASE ... SET autocommit = 1 causes an implicit commit if the value was 0. All these statements cause an implicit commit before execution. This means that, even if the statement fails with an error, the transaction is committed. Some of them, like CREATE TABLE ... SELECT, also cause a commit immediatly after execution.
The DATA step begins with the DATA statement. You use the DATA statement to create the following types of output: SAS data sets, data views, and stored programs. You can specify more than one output in a DATA statement.However, only one of the outputs can be a data view.f you use an ALTER password with the DESCRIBE and EXECUTE statements, the following items apply: SAS executes both the DESCRIBE and the EXECUTE statements. If you execute a stored compiled DATA step program or DATA step view with an invalid ALTER password: The DESCRIBE statement does not execute.