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Comment:Attempt to improve the INSERT documentation.
Timelines: family | ancestors | descendants | both | trunk
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SHA3-256: 89ca937f0ea167388480f36c21c9487227da819e7ab641e7abd1a91396612149
User & Date: drh 2017-07-01 23:23:01
Context
2017-07-10
19:55
Merge fixes from the 3.19 branch. check-in: fea84d9dc3 user: drh tags: trunk
2017-07-01
23:24
Attempt to improve the INSERT documentation. check-in: 6b1a2005d8 user: drh tags: branch-3.19
23:23
Attempt to improve the INSERT documentation. check-in: 89ca937f0e user: drh tags: trunk
2017-06-30
00:47
Add the "fts5ext.so" target for building an SQLite extension that enables the sqlite3 command-line shell to access the website search database. check-in: 4110cb10fc user: drh tags: trunk
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Changes to pages/lang.in.

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##############################################################################
Section INSERT insert {INSERT *INSERTs}

RecursiveBubbleDiagram insert-stmt
</tcl>

<p>The INSERT statement comes in three basic forms.  
<ul>

<li><p>^The first form (with the "VALUES" keyword) creates one or more
new rows in
an existing table. ^If the <yyterm>column-name</yyterm> list after
<yyterm>table-name</yyterm> is omitted then the number
of values inserted into each row
must be the same as the number of columns in the table. ^In this case
the result of evaluating the left-most expression from each term of
the VALUES list is inserted into the left-most column of each new row,
................................................................................
VALUE list must match the number of
specified columns. ^Each of the named columns of the new row is populated
with the results of evaluating the corresponding VALUES expression. ^Table
columns that do not appear in the column list are populated with the 
[default column value] (specified as part of the [CREATE TABLE] statement), or
with NULL if no [default value] is specified.


<li><p>The second form of the INSERT statement contains a [SELECT] statement
instead of a VALUES clause. ^A new entry is inserted into the table for each
row of data returned by executing the SELECT statement. ^If a column-list is
specified, the number of columns in the result of the SELECT must be the same
as the number of items in the column-list. ^Otherwise, if no column-list is
specified, the number of columns in the result of the SELECT must be the same
as the number of columns in the table. ^Any SELECT statement, including
[compound SELECTs] and SELECT statements with [ORDER BY] and/or [LIMIT] clauses, 
may be used in an INSERT statement of this form.


<li><p>The third form of an INSERT statement is with DEFAULT VALUES.
^(The INSERT ... DEFAULT VALUES statement inserts a single new row into the
named table.)^ ^Each column of the new row is populated with its 
[default value], or with a NULL if no default value is specified 
as part of the column definition in the [CREATE TABLE] statement.

</ul>



<p>^The "REPLACE" and "INSERT OR <i>action</i>" forms specify an alternative

constraint conflict resolution algorithm to use during this one INSERT command.
See the section titled [ON CONFLICT] for additional information.
For compatibility with MySQL, ^the parser allows the use of the
single keyword <a href="lang_replace.html">REPLACE</a> as an 
alias for "INSERT OR REPLACE".

<p>^(The optional "<i>schema-name</i><b>.</b>" prefix on the 
<yyterm>table-name</yyterm>
is supported for top-level INSERT statements only.)^  ^The table name must be







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##############################################################################
Section INSERT insert {INSERT *INSERTs}

RecursiveBubbleDiagram insert-stmt
</tcl>

<p>The INSERT statement comes in three basic forms.  
<ol>
<li><p><b>INSERT INTO </b><i>table</i><b> VALUES(...);</b>
<p>^The first form (with the "VALUES" keyword) creates one or more
new rows in
an existing table. ^If the <yyterm>column-name</yyterm> list after
<yyterm>table-name</yyterm> is omitted then the number
of values inserted into each row
must be the same as the number of columns in the table. ^In this case
the result of evaluating the left-most expression from each term of
the VALUES list is inserted into the left-most column of each new row,
................................................................................
VALUE list must match the number of
specified columns. ^Each of the named columns of the new row is populated
with the results of evaluating the corresponding VALUES expression. ^Table
columns that do not appear in the column list are populated with the 
[default column value] (specified as part of the [CREATE TABLE] statement), or
with NULL if no [default value] is specified.

<li><p><b>INSERT INTO </b><i>table</i><b> SELECT ...;</b>
<p>The second form of the INSERT statement contains a [SELECT] statement
instead of a VALUES clause. ^A new entry is inserted into the table for each
row of data returned by executing the SELECT statement. ^If a column-list is
specified, the number of columns in the result of the SELECT must be the same
as the number of items in the column-list. ^Otherwise, if no column-list is
specified, the number of columns in the result of the SELECT must be the same
as the number of columns in the table. ^Any SELECT statement, including
[compound SELECTs] and SELECT statements with [ORDER BY] and/or [LIMIT] clauses, 
may be used in an INSERT statement of this form.

<li><p><b>INSERT INTO </b><i>table</i><b> DEFAULT VALUES;</b>
<p>The third form of an INSERT statement is with DEFAULT VALUES.
^(The INSERT ... DEFAULT VALUES statement inserts a single new row into the
named table.)^ ^Each column of the new row is populated with its 
[default value], or with a NULL if no default value is specified 
as part of the column definition in the [CREATE TABLE] statement.

</ol>

<p>
^The initial "INSERT" keyword can be replaced by
"REPLACE" and "INSERT OR <i>action</i>" to specify an alternative
constraint [ON CONFLICT|conflict resolution algorithm] to use during 
that one INSERT command.

For compatibility with MySQL, ^the parser allows the use of the
single keyword <a href="lang_replace.html">REPLACE</a> as an 
alias for "INSERT OR REPLACE".

<p>^(The optional "<i>schema-name</i><b>.</b>" prefix on the 
<yyterm>table-name</yyterm>
is supported for top-level INSERT statements only.)^  ^The table name must be