Search keyword with LIKE %[keyword]%

问题

I have a TransactionDetails table with TransactionId, TransactionDetail columns, those are used to track all the transactions within the application.

The sample records of the TransactionDetail are:

[Blah][Log] 20 Records Inserted
[Blah][Exception] Fails on INSERT INTO
[Blah][Error] Authentication Fails Logged
[Blah][Warning] Null value is eliminated by an aggregate
[Blah][Log] 10 Records Deleted

I want to filter the TransactionDetail columns having the [Log] only (The Log, Logged keyword also exist in the other rows). The search query with [] consider as regular expression pattern. How can I skip that and get the required details only.

I have tried the \ escape character in front of the [, ], but it doesn't return any result.

SELECT *
FROM TransactionDetails
WHERE TransactionDetail LIKE '%\[Log\]%'

Expected result:

[Blah][Log] 20 Records Inserted
[Blah][Log] 10 Records Deleted

SQL Fiddle: http://sqlfiddle.com/#!3/d69f3d/1

回答1:

Escape SQL wildcard characters by putting them in the group, i.e.:

SELECT *
FROM TransactionDetails
WHERE TransactionDetail LIKE '%[[]Log]%'

回答2:

As mentioned by jarlh in the comment the ESCAPE option also works:

SELECT *
FROM TransactionDetails
WHERE TransactionDetail LIKE '%#[Log#]%' ESCAPE '#'

Working Demo: http://sqlfiddle.com/#!3/d69f3d/37

Update: As per the reply by t-clausen.dk in this comment, the escape_character is not required for the ]. So the code below also works.

SELECT *
FROM TransactionDetails
WHERE TransactionDetail LIKE '%#[Log]%' ESCAPE '#'

来源：https://stackoverflow.com/questions/35293531/search-keyword-with-like-keyword

标签

sql

sql-server

sql-like