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Test and documentation updates for sub-queries. (CVS 373)

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FossilOrigin-Name: 607c0c49b2098771020514198cb1076de8245a62
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drh
2002-02-18 03:21:45 +00:00
parent 22f70c32f0
commit d820cb1b75
5 changed files with 104 additions and 38 deletions
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23
www/lang.tcl
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@ -1,7 +1,7 @@
#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: lang.tcl,v 1.22 2002/02/03 19:06:04 drh Exp $}
set rcsid {$Id: lang.tcl,v 1.23 2002/02/18 03:21:47 drh Exp $}
puts {<html>
<head>
@ -782,7 +782,7 @@ information.</p>
Section SELECT select
Syntax {sql-statement} {
SELECT <result> FROM <table-list>
SELECT <result> FROM <table-list>
[WHERE <expression>]
[GROUP BY <expr-list>]
[HAVING <expression>]
@ -790,11 +790,14 @@ SELECT <result> FROM <table-list>
[ORDER BY <sort-expr-list>]
[LIMIT <integer> [OFFSET <integer>]]
} {result} {
STAR | <result-column> [, <result-column>]*
<result-column> [, <result-column>]*
} {result-column} {
<expression> [ [AS] <string> ]
STAR | <expression> [ [AS] <string> ]
} {table-list} {
<table-name> [, <table-name>]*
<table> [, <table>]*
} {table} {
<table-name> [AS <alias>] |
( <select> ) [AS <alias>]
} {sort-expr-list} {
<expr> [<sort-order>] [, <expr> [<sort-order>]]*
} {sort-order} {
@ -809,13 +812,15 @@ result of a SELECT is zero or more rows of data where each row
has a fixed number of columns. The number of columns in the
result is specified by the expression list in between the
SELECT and FROM keywords. Any arbitrary expression can be used
as a result. If the result specification is just}
puts "[Operator *] then all columns of all tables are used as the result."
puts {</p>
as a result. If a result expression is }
puts "[Operator *] then all columns of all tables are substituted"
puts {for that one expression.</p>
<p>The query is executed again one or more tables specified after
the FROM keyword. If more than one table is specified, then the
query is against the join of the various tables.</p>
query is against the (inner) join of the various tables. A sub-query
in parentheses may be substituted for any table name in the FROM clause.
</p>
<p>The WHERE clause can be used to limit the number of rows over
which the query operates. In the current implementation,