MySql INSERT -> SELECT statement
Ovo će biti jako korisno za obrade, molim Vas da
detaljno proučite kako ovo funkcioniše.
Poenta je da kreirate insert statement
kao neki select iz druge/iste tabele.
Koristan link je:
http://dev.mysql.com/doc/refman/5.0/en/
tamo se nalazi kompletna MYSQL dokumentacija.
radovan
INSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]
[INTO]tbl_name
[(col_name
,...)]
SELECT ...
[ ON DUPLICATE KEY UPDATEcol_name
=expr
, ... ]
With INSERT ... SELECT
, you can quickly insert many rows into a table from one or many tables. For example:
INSERT INTO tbl_temp2 (fld_id)
SELECT tbl_temp1.fld_order_id
FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100;
The following conditions hold for a INSERT ... SELECT
statements:
Specify
IGNORE
to ignore rows that would cause duplicate-key violations.DELAYED
is ignored withINSERT ... SELECT
.The target table of the
INSERT
statement may appear in theFROM
clause of theSELECT
part of the query. (This was not possible in some older versions of MySQL.) In this case, MySQL creates a temporary table to hold the rows from theSELECT
and then inserts those rows into the target table. However, it remains true that you cannot useINSERT INTO t ... SELECT ... FROM t
whent
is aTEMPORARY
table, becauseTEMPORARY
tables cannot be referred to twice in the same statementAUTO_INCREMENT
columns work as usual.To ensure that the binary log can be used to re-create the original tables, MySQL does not allow concurrent inserts for
INSERT ... SELECT
statements.Currently, you cannot insert into a table and select from the same table in a subquery.
To avoid ambigious column reference problems when the
SELECT
and theINSERT
refer to the same table, provide a unique alias for each table used in theSELECT
part, and qualify column names in that part with the appropriate alias.
In the values part of ON DUPLICATE KEY UPDATE
, you can refer to columns in other tables, as long as you do not use GROUP BY
in the SELECT
part. One side effect is that you must qualify non-unique column names in the values part.
www.baco.co.yu
<< Home