当结果插入 HSQLDB 表时,如何对结果进行排序?
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【中文标题】当结果插入 HSQLDB 表时,如何对结果进行排序?【英文标题】:How can I order the results as they are inserted into a HSQLDB table? 【发布时间】:2011-11-17 04:56:02 【问题描述】:当我使用 HSQLDB 运行以下脚本时,我收到错误消息 user lacks privilege or object not found: T2C1
。如何在将行插入表TABLE3
时对其进行排序?我可以在不添加另一个表的情况下实现此目标吗?
请注意,如果我评论 ORDER BY "T2C1", "T1C2"
行,我不会收到任何错误消息,但 TABLE3
也不会得到排序。
DROP TABLE "PUBLIC"."TABLE1" IF EXISTS;
CREATE TABLE "PUBLIC"."TABLE1" (
"C1" VARCHAR(10),
"C2" VARCHAR(10),
"C3" VARCHAR(10)
);
INSERT INTO "PUBLIC"."TABLE1" ("C1", "C2", "C3") VALUES ('a', 'b', 'c');
INSERT INTO "PUBLIC"."TABLE1" ("C1", "C2", "C3") VALUES ('d', 'e', 'f');
DROP TABLE "PUBLIC"."TABLE2" IF EXISTS;
CREATE TABLE "PUBLIC"."TABLE2" (
"C1" VARCHAR(10),
"C2" VARCHAR(10),
);
INSERT INTO "PUBLIC"."TABLE2" ("C1", "C2") VALUES ('a', 'b');
INSERT INTO "PUBLIC"."TABLE2" ("C1", "C2") VALUES ('u', 'v');
DROP TABLE "PUBLIC"."TABLE3" IF EXISTS;
CREATE TABLE "PUBLIC"."TABLE3" (
"C1" VARCHAR(10),
"C2" VARCHAR(10),
);
INSERT INTO "PUBLIC"."TABLE3" (
"C1",
"C2"
)
SELECT
(SELECT
"T2"."C1" AS "T2C1"
FROM "PUBLIC"."TABLE2" "T2"
WHERE "T2"."C1" = "T1"."C1"),
"T1"."C2" AS "T1C2"
FROM "PUBLIC"."TABLE1" "T1"
ORDER BY "T2C1", "T1C2"
;
* *DSV_COL_DELIM=,
* *DSV_ROW_DELIM=\n
* *DSV_TARGET_FILE=results.csv
\x "PUBLIC"."TABLE3"
【问题讨论】:
【参考方案1】:HSQLDB 2.2.x 支持在此处使用 ORDER BY。 SELECT 的问题是标量子查询缺少列别名 T2C1。试试这个:
INSERT INTO "PUBLIC"."TABLE3" (
"C1",
"C2"
)
SELECT
(SELECT
"T2"."C1" AS "T2C1"
FROM "PUBLIC"."TABLE2" "T2"
WHERE "T2"."C1" = "T1"."C1") AS T2C1,
"T1"."C2" AS "T1C2"
FROM "PUBLIC"."TABLE1" "T1"
ORDER BY "T2C1", "T1C2"
;
【讨论】:
【参考方案2】:这对我来说没有多大意义,因为插入的顺序与其他人已经在各个论坛上提到的无关:
http://www.dbforums.com/microsoft-sql-server/1617505-insert-into-order.html http://social.msdn.microsoft.com/Forums/en/transactsql/thread/aeb1053d-0dc2-4dc3-96f5-8b213fed9669我认为 HSQLDB 只是给出了错误的错误信息。它不适用于 MSSQL。
【讨论】:
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