使用Python遊標類與LIKE語句執行多匹配查詢

Question

試圖執行匹配4個變量的選擇查詢，其中一個查詢標題中的字符串。如何用python遊標類執行LIKE語句？或另一種方式？

stmt = "SELECT * FROM publication NATURAL JOIN journal NATURAL JOIN authors WHERE name = ? AND year = ? AND booktitle = ? AND title LIKE '%%%s%%'" % (input_names, input_year, input_booktitle, input_string) 
print(stmt) 
cur.execute(stmt) 

編輯：表模式

%%sql 
DROP TABLE IF EXISTS publication; 
CREATE TABLE publication(
    ID INT PRIMARY KEY NOT NULL, 
    title VARCHAR NOT NULL 
); 

/* Author Entity set and writes_for relationship */ 
DROP TABLE IF EXISTS authors; 
CREATE TABLE authors(
    name VARCHAR(200) PRIMARY KEY NOT NULL, 
    ID INT, 
    title VARCHAR(200), 
    FOREIGN KEY(id, title) REFERENCES publication(ID, title) 
); 

/* Journal Entity set and apart_of relationship */ 
DROP TABLE IF EXISTS journal; 
CREATE TABLE journal(
    booktitle VARCHAR(200) PRIMARY KEY NOT NULL, 
    pages INT, 
    year INT(4), 
    ID INT, 
    title VARCHAR(200), 
    FOREIGN KEY(ID, title) REFERENCES publication(ID, title) 
); 

Answer 1

我想，真正的問題是，你正在做的加入，你不從告訴它從哪裏拿的列（從表） 。

你可以請嘗試添加表嗎？ 我不知道它會幫助，但讓我們嘗試（因爲也許你沒有在這些表中相同的列名稱）

那樣？

stmt = "SELECT * FROM publication NATURAL JOIN journal NATURAL JOIN 
authors WHERE authors.name = ? AND journal.year = ? AND 
journal.booktitle = ? AND journal.title LIKE  
'%%%s%%'" % (input_names, input_year, input_booktitle, input_string) 
print(stmt) 
cur.execute(stmt) 

第二件事： 您應該使用'％s'而不是'？'

stmt = "SELECT * FROM publication NATURAL JOIN journal NATURAL JOIN 
authors WHERE authors.name = '%s' AND journal.year = '%s' AND 
journal.booktitle = '%s' AND journal.title LIKE  
'%%%s%%'" % (input_names, input_year, input_booktitle, input_string) 
print(stmt) 
cur.execute(stmt)