查詢執行

SQL 中級

Jasmin Ludolf

Data Science Content Developer, DataCamp

執行順序

-- Order of execution

SELECT name

FROM people

LIMIT 10;

SELECT nme
FROM people;

field "nme" does not exist
LINE 1: SELECT nme
               ^
HINT:  Perhaps you meant to reference the field "people.name".

SELECT title, country duration
FROM films;

syntax error at or near "duration"
LINE 1: SELECT title, country duration
                      ^

SELCT title, country, duration
FROM films;

syntax error at or near "SELCT"
LINE 1: SELCT title, country, duration
        ^

常見錯誤：

從錯誤中學習

筆電與放大鏡，凸顯程式碼中的臭蟲

SQL 中級