您可以省略case语句中的表达式，并使“when”语句更加详细。
您可以省略case语句中的表达式，并使“when”语句更加详细。
DECODE is considered the most powerful function in Oracle. Oracle 8i release introduced the CASE expression. The CASE expression can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query i...
Case statements can raise acase_not_foundexception. This happens if they run without processing one of the clauses. i.e. none of thewhenconditions are true and there’s noelseclause. There is no such exception forif-elsifblocks. If you have a series like this: The database will con...
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2、也可通过numpy.where/numpy.select/pandas.DataFrame().loc实现，更推荐这三种方法，速度很快，参考...
Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. The CASE expression evaluates a list of conditions and returns one of the multiple possible results. You can use a CASE expression in any statement or clause that accepts a valid expre...
The user can enter a hyperlink (e.g. http://www.oracle.com and https://www.oracle.com) in the Field Label Help for the Case Form Fields When the user clicks a hyperlink, the system opens the link in a new Internet Explorer browser window. The following Case Form fields are type ahe...
Annotations in Advanced Conditions To use annotations when you create an advanced condition, navigate toCase Series, Cases,and selectCase Annotations.This field is a freehand text field and supports single select only. This note is not available in Argus Safety and does not impact the case series...
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: ...