插入相关表

Question

我有一个具有以下架构的数据库设置：

CREATE TABLE siteInfo (
    siteID             SERIAL  NOT NULL,
    siteName           TEXT    NOT NULL,
    siteHost           TEXT    NOT NULL,
    notes              TEXT    NOT NULL,
    allowableCountries TEXT    NOT NULL,
    displayChance      INT     NOT NULL,
    imagePath          TEXT    NOT NULL,
    PRIMARY KEY (siteID)
);

CREATE TABLE siteLinks (
    siteID             SERIAL  NOT NULL,
    URL                TEXT    NOT NULL,
    FOREIGN KEY (siteID) REFERENCES siteInfo(siteID) ON DELETE CASCADE
);

CREATE TABLE siteDemographicLinks (
    siteID             SERIAL  NOT NULL,
    URL                TEXT    NOT NULL,
    country            TEXT    NOT NULL,
    chance             INT     NOT NULL,
    FOREIGN KEY (siteID) REFERENCES siteInfo(siteID) ON DELETE CASCADE
);

CREATE TABLE linkVisits (
    siteID             SERIAL  NOT NULL,
    rawVisit           BIGINT  NOT NULL,
    redirects          BIGINT  NOT NULL,
    FOREIGN KEY (siteID) REFERENCES siteInfo(siteID) ON DELETE CASCADE
);

我的表单中的数据采用以下格式：

array(7) {
["siteName"]=>string(9) "Site Name"
["siteHost"]=>string(9) "SIte Host"
["notes"]=>string(5) "Notes"
["links"]=>array(2) {[0]=>string(6) "Link 1" [1]=>string(6) "Link 2"}
["countries"]=>string(4) "None"
["displayChance"]=>string(2) "15"
["extraLink"]=>array(2) {
   [0]=>array(3) {
      ["url"]=>string(7) "dSite 1"
      ["countries"]=>string(4) "NONE"
      ["chance"]=>string(2) "11"
      }
   [1]=>array(3) {
      ["url"]=>string(6) "dSite2"
      ["countries"]=>string(4) "None"
      ["chance"]=>string(2) "13"
      }
   }
}

我将如何大量地将数据插入到许多类型表中，以便它们引用插入到一种类型表中的元组？

我构造了这个查询：

INSERT INTO siteInfo (siteName, siteHost, notes, allowableCountries, displayChance, imagePath)
VALUES ('Sample', 'sample.com', 'note', 'NONE', '50', '../var');

然后我需要将数据插入siteLinks表中，这与表中已有的条目相关siteInfo。

INSERT INTO siteLinks (siteID, URL)
VALUES ((SELECT siteid FROM siteinfo WHERE sitename='Sample'), 'test');

有没有更好的方法来做到这一点？

Answer 1

使用数据修改 CTE链接您的插入：

WITH ins0 AS (
   INSERT INTO siteInfo (siteName, siteHost, notes, ... )
   VALUES ('Sample', 'sample.com', 'note', ... );
   RETURNING siteid
   )
INSERT INTO siteLinks (siteID, URL)
SELECT siteid, 'test'
FROM   ins0;

或使用lastval()或currval()：

BEGIN;

INSERT INTO siteInfo (siteName, siteHost, notes, ... )
VALUES ('Sample', 'sample.com', 'note', ... );

INSERT INTO siteLinks (siteID, URL)
VALUES (lastval(), 'test');

COMMIT;

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