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This article mainly explains "what are the PostgreSQL conditional statements". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the PostgreSQL conditional statements"?

1. IFDECLARE A NUMBER: = 4; BEGIN IF A > 0 AND A

< 3 THEN DBMS_OUTPUT.PUT_LINE('小'); ELSIF A >

= 3 AND A

< 6 THEN DBMS_OUTPUT.PUT_LINE('大'); ELSE DBMS_OUTPUT.PUT_LINE('错误'); END IF; END; /二、CASE 简单型的case DECLARE A NUMBER := 4; BEGIN CASE TRUE WHEN A >

0 AND A

< 3 THEN DBMS_OUTPUT.PUT_LINE('小'); WHEN A >

= 3 AND A

< 6 THEN DBMS_OUTPUT.PUT_LINE('大'); ELSE DBMS_OUTPUT.PUT_LINE('错误'); END CASE; END; / 搜索型的case DECLARE A NUMBER := 4; BEGIN CASE WHEN A >

0 AND A

< 3 THEN DBMS_OUTPUT.PUT_LINE('小'); WHEN A >

= 3 AND A < 6 THEN DBMS_OUTPUT.PUT_LINE ('big'); ELSE DBMS_OUTPUT.PUT_LINE ('error'); END CASE; END; / Thank you for reading, the above is the content of "what are the PostgreSQL conditional statements?" after the study of this article, I believe you have a deeper understanding of what the PostgreSQL conditional statements have, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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