一般用法1select (case when 1=2 or 'a' like '%b%' then 'a' when 1=4 or 'b' in ('b','bb') then 'b' else 'c' end)as testField from dual 结果为b。多次when和java中else if一样 执行顺序是从前到后 当满足某个when后则后面的when不再执行... ...
The searched case statement is the much more powerful cousin of the simple case statement. The searched case statement is like an if…then…else structure, and can be used to conditionally search and replace values using logical operators and multiple conditions. Let's look at an example: SELEC...
If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome ...
Next, he takes a look at the Memory Statistics and Garbage Collector panels, which show additional information about memory usage and the garbage collector, respectively. If necessary, Marcus can change some of the values from this tab; for example he could change the allocated Java heap size ...
In this case, you must download the necessary key from Oracle Key Vault to a local wallet file to be used when you decrypt the backup during the restore process. For example, suppose that the Finance_DB database had recently migrated to use an Online Master Key to Oracle Key Vault after...
Although it has the word “index” in its name, a storage index is nothing like a normal index. Normal indexes are used to zero in on the locations where the rows are most likely to be found; storage indexes are used just for the opposite reason – where the rows are most likely not...
For example, OCI Data Transfer service or OCI Data Transfer Appliance may be used to load a large volume of on-premises data from historical planning or data warehouse repositories. When large volumes of data must be moved on an ongoing basis, we recommend using OCI FastConnect, which provides...
type is used to make some flexibility example use time.Time field and pass type=timestamp in this case timestamp will be used instead of default value for time.Time which is date type can be one of the following:number mapped to golang types integer, float, string, bool varchar mapped ...
rwc constant varchar2(1) := case when bitand(flags,2)!=0 then '%' end; found boolean := false; begin if col is null then return true; end if; for i in 1 .. col.count loop found := trim('"' from nam) like lwc||trim('"' from case when upcase then upper(col(i)) else...
The value can be a comma delimited list of schema name but not when using TABLE export type because in this case it will generate the CREATE SCHEMA statement and it doesn't support multiple schema name. For example, if you set PG_SCHEMA to something like "user_schema, public", the ...