Develop Reference

Sqlite query to find all rows where a particular column field value lies in input string

I got a scenario where I have to find all rows in Android SQLite db, where a particular column field value lies in the input string. For example,
Input string:
I am not done yet, I can’t call it a day I need to work more for couple of hours.
Now my table in SQLite(Android) has a column called Title
I need to find all rows whose Title column field values lies in above input string. Basically I want following rows
where the full Title string is like one of below
call it a day
am not done yet
I want to know if it is possible using a single query in sqlite Android or not. What I know is LIKE query work on opposite manner.

Given that your table contains a column title which has titles that you want to match in the given string, you can do concatenation with % to use LIKE
select *
from your_table
where 'your input string here' like '%' || title || '%'

Android Sqlite Database Formation

In my application I take entry from user as :-
Name:- -------------------------
Favorite Fruit:- a)
b)
c)
--------- Add More ----------
Then I want to save it into a Sqlite database. Now I provide user to type in edittext search like this:-
Search Fruit:- Apple,Banana
And then I want to query my database and Print the name of those who like atleast Apple and Banana.
Now my issue is how do I make my database columns to achieve results faster.
Should I make two columns Name and FruitsLiked or something else. Because if I make only two colums then how do I search into database.
Thanks

Create one table n two columns. First column is for name , second one comma separated list of fruits.
Then as db query use like keyword based query

Searching Sqlite Database using Exact Keyword

i`m trying to search a Sqlite Database , with this condition : i want to find a string using an Exact Keyword. let me explain this to you .
i have 3 rows as follow :
catching cold
i have a cat
two cats was seen in your house yesterday
i want to search these rows with keyword "cat" and i expect this result :
i have a cat
i am using this SQL code so far :
Select * FROM MyTable WHERE Mycolumn Like '%cat%'
But Returning Result is All these 3 Rows:
catching cold
i have a cat
two cats was seen in your house yesterday
What can i do to get my expected result?
thank you in advance.

The % character in the argument of a LIKE clause matches any string, including the empty string. Unfortunately, SQLite doesn't have the REGEXP function built in (and Android's SQLite doesn't have it).
What you can do instead is use FTS (full text search). How to do so is described here: https://www.sqlite.org/fts3.html#section_1_2
Using your example, you would set it up like so:
create virtual table textsearch using fts4(content);
insert into textsearch (content) values ('catching cold'), ('i have a cat'), ('two cats was seen in your house yesterday')
Then you can do a simple text query with the MATCH operator:
select * from textsearch where content match 'cat';
If you try the above in a sqlite3 shell, you'll see it returns only 'i have a cat'. There's a lot more you can do with the match operator, explained on the page I linked above.

You can use a regular expression with a special pattern for word boundaries.
Select * FROM MyTable WHERE Mycolumn = 'cat'
Corrected my answer i think that should work.

How to Use CONTAINS keyword in Sqlite Database

what i am trying to use is that i want to select cities from my LocationByCity table in sqlite database each time As user inters search word in a search box,
for example if user enters F i want all the CityNames Starting From F ,so how can i do that?
Thanx in advance.

I'd have to check up, but I believe you want to use the LIKE keyword.
Syntax somthing along the lines of:
Select Fieldname From Tablename where fieldname LIKE ('%$myvar%');
where the % signs are wildcard characters.
Not sure if sqlite has fulltext indexing so you should be aware that can get very slow depending on how many rows you have in the table.

How to query similar records in SQLite database from Android?

Let's say an SQLite database column contains the following value:
U Walther-Schreiber-Platz
Using a query I'd like to find this record, or any similar records, if the user searches for the following strings:
walther schreiber
u walther
walther-schreiber platz
[Any other similar strings]
However I cannot figure out any query which would do that. Especially if the user does not enter the - character.
Example:
select * from myTable where value like '%walther schreiber%'; would not return the result because of the missing -.
Thanks,
Robert

So, as I said in my comment, I think you can have a query along the lines of:
select * from myTable where LOWER(value) like <SearchValue>
I'm assuming you're collecting the <SearchValue> from the user programmatically, so would be able to do the following: <SearchValue> would need to be: The user's search string, appropriately cleansed to avoid SQL injection attacks, converted to lower case, with all of the spaces converted to '%', so that they match zero or more characters...
So you would have (for example):
select * from myTable where LOWER(value) like '%walther%schreiber%'
select * from myTable where LOWER(value) like '%walther-schreiber%platz%'
etc... however, this does assume that the word order is the same, which in your examples it is...