sqlite 字符串拼接

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select path || ‘%‘  from t_category where depth = 0 and type = 0

用‘||‘拼接字符串

比如path是/1001/的话 那结果就是/1001/%

数字相加

SELECT ‘A‘+‘B‘  结果为0

SELECT "A"+"1"  结果为1

SELECT "A"+1   结果为1

SELECT 2+1  结果为3

=在“+”运算中，SQLite将字符串非数字串都当作0处理了

||  String Concatenation
*  Arithmetic Multiply
/  Arithmetic Divide
%  Arithmetic Modulus
+  Arithmetic Add
–  Arithmetic Subtract
<<  Bitwise Right shift
>>  Bitwise Left shift
&  Logical And
|  Logical Or
<  Relational Less than
<=  Relational Less than or equal to
>  Relational Greater than
>=  Relational Greater than or equal to
=  Relational Equal to
==  Relational Equal to
<>  Relational Not equal to
!=  Relational Not equal to
IN  Logical In
AND  Logical And
OR  Logical Or
LIKE  Relational String matching
GLOB  Relational Filename matching

sqlite 字符串拼接

标签：sqlite   equal   not   ica   amp   数字   logical   glob   gic   

原文地址：http://www.cnblogs.com/gsk99/p/7803566.html