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Overview
| Comment: | Add a new FAQ entry that attempts to explain the difference between single quotes and double quotes. |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | b405f2eeebeb7bb331da5d2783db6248 |
| User & Date: | drh 2009-03-18 15:14:03 |
Context
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2009-03-19
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| 00:04 | Fix a typo in the limits.html document. check-in: 6ddbe9cdf0 user: drh tags: trunk | |
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2009-03-18
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| 15:14 | Add a new FAQ entry that attempts to explain the difference between single quotes and double quotes. check-in: b405f2eeeb user: drh tags: trunk | |
| 14:19 | Fix typos in documentation. This is the fix for ticket [9ed3b9626c9462e11a557621152f3e2d4eead482] check-in: cfa4627882 user: drh tags: trunk | |
Changes
Changes to pages/faq.in.
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compile-time options when building SQLite.
} {
The [omitfeatures | SQLITE_OMIT_...] compile-time options only work
when building from canonically source files. They do <u>not</u> work
when you build from the SQLite [amalgamation] or from the pre-processed
source files.
It is possible to build a special [amalgamation] that will work with
a predetermined set of SQLITE_OMIT_... options. Instructions for doing
so can be found with the [omitfeatures | SQLITE_OMIT_... documentation].
}
# End of questions and answers.
#############
hd_puts {<h2>Frequently Asked Questions</h2>}
hd_puts {<p>See also <a href="http://www.sqlite.org/cvstrac/wiki?p=SqliteWikiFaq">SqliteWikiFaq</a>.</p>}
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compile-time options when building SQLite.
} {
The [omitfeatures | SQLITE_OMIT_...] compile-time options only work
when building from canonically source files. They do <u>not</u> work
when you build from the SQLite [amalgamation] or from the pre-processed
source files.
<p>It is possible to build a special [amalgamation] that will work with
a predetermined set of SQLITE_OMIT_... options. Instructions for doing
so can be found with the [omitfeatures | SQLITE_OMIT_... documentation].
}
faq {
My WHERE clause expression <tt>column1="column1"</tt> does not work.
It causes every row of the table to be returned, not just the rows
where column1 has the value "column1".
} {
Use single-quotes, not double-quotes, around string literals in SQL.
This is what the SQL standard requires. Your WHERE clause expression
should read: <tt>column1='column2'</tt>
<p>SQL uses double-quotes around identifiers (column or table names) that
contains special characters or which are keywords. So double-quotes are
a way of escaping identifier names. Hence, when you say
<tt>column1="column1"</tt> that is equivalent to
<tt>column1=column1</tt> which is obviously always true.
}
# End of questions and answers.
#############
hd_puts {<h2>Frequently Asked Questions</h2>}
hd_puts {<p>See also <a href="http://www.sqlite.org/cvstrac/wiki?p=SqliteWikiFaq">SqliteWikiFaq</a>.</p>}
|