如何將一個布爾值包含在sql lite子句中

Question

這讓我瘋狂。我覺得我已經嘗試了一切，但沒有結果。如何在sql lite中的where子句中包含布爾條件？

我嘗試了這些

"Select * from table where col = 1" 
"Select * from table where col = '1'" 
"Select * from table where col = true" 
"Select * from table where col = 'true'" 
"Select * from table where col = 'True'" 
"Select * from table where col is True" 

沒有。我甚至嘗試在查詢函數中包含「true」作爲whereArgs。

以前有人做過這個嗎？

Answer 1

SQLite沒有單獨的布爾存儲類。相反，布爾值被存儲爲整數0（假）和1（真）。

來源：SQLite

第一個就會發出正確的。

Answer 2

SQLIte中沒有真正的布爾值。如果您創建使用SQLite管理員，這裏是你如何做到這一點：

Select * from table where col is 'Y' 

Answer 3

這行之有效 「選擇從表*其中列= '真'」

Answer 4

SQLite version 3.7.4 
Enter ".help" for instructions 
Enter SQL statements terminated with a ";" 
sqlite> CREATE TABLE "stack_test" ("id" INTEGER, "bool_col" boolean); 
sqlite> insert into stack_test values(1,'t'); 
sqlite> insert into stack_test values(2,'f'); 
sqlite> insert into stack_test values(3,'1'); 
sqlite> insert into stack_test values(4,'0'); 
sqlite> insert into stack_test values(5,1); 
sqlite> insert into stack_test values(6,0); 
sqlite> insert into stack_test values(7,banana); 
Error: no such column: banana 
sqlite> insert into stack_test values(7,'banana'); 
sqlite> .headers on 
sqlite> select * from stack_test; 
id|bool_col 
1|t 
2|f 
3|1 
4|0 
5|1 
6|0 
7|banana 

sqlite> select * from stack_test where bool_col=t; 
Error: no such column: t 
sqlite> select * from stack_test where bool_col='t'; 
id|bool_col 
1|t 
sqlite> select * from stack_test where bool_col=0; 
id|bool_col 
4|0 
6|0 
sqlite> select * from stack_test where bool_col=1; 
id|bool_col 
3|1 
5|1 
sqlite> select * from stack_test where bool_col=true; 
Error: no such column: true 
sqlite> select * from stack_test where bool_col=banana; 
Error: no such column: banana 
sqlite> select * from stack_test where bool_col='banana'; 
id|bool_col 
7|banana 
sqlite> 
sqlite> .schema stack_test 
CREATE TABLE "stack_test" ("id" INTEGER, "bool_col" boolean); 
sqlite>