lessons learned from the Qlikview loads the data from DB into qvd files
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Qlikview加载数据库里的数据,一般都是通过ODBC和数据库进行连接,然后把数据库里的相应的表里的数据加载到本地的disk folder里,后期就可以直接从用本地的disk folder里的QVD的文件获取数据来做DASHBOARD了。本人一开始加载数据的时候老是会死机,原因是我在加载好一个数据库里的表里数据到本地的QVD文件后,没有及时的从内存里把相应的表给删除掉,导致了多个表都在内存里,而且他们还会通过相同的自动名称进行关联,有时候QLIKVIEW 会自动的产生很多个synthetic的key. 所以在加载数据的时候要及时的把内存里的表给删除掉是个好办法。
下面是我加载数据库里的数据并且把它保存到本来生成QVD 文件的例子:
//Loading the data from DB to local disk folder
BI_CUSTOMER:
LOAD CITY,
"CUSTOMER_ID",
"CUSTOMER_INDUSTRY",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
LOB,
"OPERATION_UNIT",
"ORGANIZATION_ID";
SQL SELECT CITY,
"CUSTOMER_ID",
"CUSTOMER_INDUSTRY",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
LOB,
"OPERATION_UNIT",
"ORGANIZATION_ID"
FROM DW.dbo."BI_CUSTOMER";
STORE BI_CUSTOMER INTO D:\Qlikview_QVD_NEWDW\DW\BI_CUSTOMER.qvd (QVD);
drop table BI_CUSTOMER;
BI_CUSTOMER_ANLY:
LOAD "AR_OS",
"CUSTOMER_ID",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
DSO,
"DSO_YTD",
"MARKET_SEGMENT",
MONTH,
"OPERATING_UNIT",
"OU_ID";
SQL SELECT "AR_OS",
"CUSTOMER_ID",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
DSO,
"DSO_YTD",
"MARKET_SEGMENT",
MONTH,
"OPERATING_UNIT",
"OU_ID"
FROM DW.dbo."BI_CUSTOMER_ANLY";
STORE BI_CUSTOMER_ANLY INTO D:\Qlikview_QVD_NEWDW\DW\BI_CUSTOMER_ANLY.qvd (QVD);
drop table BI_CUSTOMER_ANLY;
BI_INV_HEADERS:
LOAD "CUSTOMER_ID",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
"INVOICE_DATE",
"INVOICE_NUMBER",
LOB,
"OPERATING_UNIT",
"ORGANIZATION_ID",
"PRIMARY_SALESREP_ID",
"TRANSACTION_ID";
SQL SELECT "CUSTOMER_ID",
"CUSTOMER_NAME",
"CUSTOMER_NUMBER",
"INVOICE_DATE",
"INVOICE_NUMBER",
LOB,
"OPERATING_UNIT",
"ORGANIZATION_ID",
"PRIMARY_SALESREP_ID",
"TRANSACTION_ID"
FROM DW.dbo."BI_INV_HEADERS";
STORE BI_INV_HEADERS INTO D:\Qlikview_QVD_NEWDW\DW\BI_INV_HEADERS.qvd (QVD);
drop table BI_INV_HEADERS;
BI_INV_LINES:
LOAD "CCY_CODE",
"CCY_RATE",
"CCY_RATE_TO_REPORTING",
COGS,
"CONTRIBUTED_MARGIN",
"GROSS_PROFIT",
"INVENTORY_ITEM_ID",
"ITEM_NUMBER",
"MARKET_SEGMENT",
"ORDER_HEADER_ID",
"ORDER_LINE_ID",
"ORDER_NUMBER",
"ORDER_TYPE",
"ORGANIZATION_ID",
"PRIMARY_QUANTITY",
"PRIMARY_UNIT_SELLING_PRICE",
"PRIMARY_UOM_CODE",
"SALES_CHANNEL",
"SALES_OFFICE_CODE",
"SALES_REGION_CODE",
"SALES_TYPE",
"SALESREP_ID",
"TRANSACTION_ID",
"TRX_DATE";
SQL SELECT "CCY_CODE",
"CCY_RATE",
"CCY_RATE_TO_REPORTING",
COGS,
"CONTRIBUTED_MARGIN",
"GROSS_PROFIT",
"INVENTORY_ITEM_ID",
"ITEM_NUMBER",
"MARKET_SEGMENT",
"ORDER_HEADER_ID",
"ORDER_LINE_ID",
"ORDER_NUMBER",
"ORDER_TYPE",
"ORGANIZATION_ID",
"PRIMARY_QUANTITY",
"PRIMARY_UNIT_SELLING_PRICE",
"PRIMARY_UOM_CODE",
"SALES_CHANNEL",
"SALES_OFFICE_CODE",
"SALES_REGION_CODE",
"SALES_TYPE",
"SALESREP_ID",
"TRANSACTION_ID",
"TRX_DATE"
FROM DW.dbo."BI_INV_LINES" WHERE TRX_DATE>'2012-03-31';
STORE BI_INV_LINES INTO D:\Qlikview_QVD_NEWDW\DW\BI_INV_LINES.qvd (QVD);
drop table BI_INV_LINES;
BI_ITEM:
LOAD BRAND,
"CAT_SEG1",
"CAT_SEG2",
COO,
"INVENTORY_ITEM_ID",
"ITEM_CODE",
"ITEM_DESCRIPTION",
LOB,
MANUFACTURER,
MODEL,
"ORGANIZATION_CODE",
"ORGANIZATION_ID",
SERIES,
"UOM_CODE";
SQL SELECT BRAND,
"CAT_SEG1",
"CAT_SEG2",
COO,
"INVENTORY_ITEM_ID",
"ITEM_CODE",
"ITEM_DESCRIPTION",
LOB,
MANUFACTURER,
MODEL,
"ORGANIZATION_CODE",
"ORGANIZATION_ID",
SERIES,
"UOM_CODE"
FROM DW.dbo."BI_ITEM";
STORE BI_ITEM INTO D:\Qlikview_QVD_NEWDW\DW\BI_ITEM.qvd (QVD);
drop table BI_ITEM;
BI_ITEM_ANLY:
LOAD DOS,
"DOS_YTD",
"INVENTORY_ITEM_ID",
"ITEM_NUMBER",
LOB,
MONTH,
"ORGANIZATION_CODE",
"ORGANIZATION_ID";
SQL SELECT DOS,
"DOS_YTD",
"INVENTORY_ITEM_ID",
"ITEM_NUMBER",
LOB,
MONTH,
"ORGANIZATION_CODE",
"ORGANIZATION_ID"
FROM DW.dbo."BI_ITEM_ANLY";
STORE BI_ITEM_ANLY INTO D:\Qlikview_QVD_NEWDW\DW\BI_ITEM_ANLY.qvd (QVD);
drop table BI_ITEM_ANLY;
BI_OU:
LOAD "ccy_code",
"organization_id",
"ou_code",
"ou_name",
"short_name";
SQL SELECT "ccy_code",
"organization_id",
"ou_code",
"ou_name",
"short_name"
FROM DW.dbo."BI_OU";
STORE BI_OU INTO D:\Qlikview_QVD_NEWDW\DW\BI_OU.qvd (QVD);
drop table BI_OU;
BI_SALESREPS:
LOAD "END_DATE_ACTIVE",
"SALES_OFFICE_CODE",
"SALES_OFFICE_NAME",
"SALES_REGION_CODE",
"SALES_REGION_NAME",
"SALESREP_ID",
"SALESREP_NAME",
"SALESREP_NUMBER";
SQL SELECT "END_DATE_ACTIVE",
"SALES_OFFICE_CODE",
"SALES_OFFICE_NAME",
"SALES_REGION_CODE",
"SALES_REGION_NAME",
"SALESREP_ID",
"SALESREP_NAME",
"SALESREP_NUMBER"
FROM DW.dbo."BI_SALESREPS";
STORE BI_SALESREPS INTO D:\Qlikview_QVD_NEWDW\DW\BI_SALESREPS.qvd (QVD);
drop table BI_SALESREPS;
BI_SALESREPS_ANLY:
LOAD "AR_OS",
DSO,
"DSO_YTD",
MONTH,
"OPERATING_UNIT",
"OU_ID",
"SALESREP_ID",
"SALESREP_NAME",
"SALESREP_NUMBER";
SQL SELECT "AR_OS",
DSO,
"DSO_YTD",
MONTH,
"OPERATING_UNIT",
"OU_ID",
"SALESREP_ID",
"SALESREP_NAME",
"SALESREP_NUMBER"
FROM DW.dbo."BI_SALESREPS_ANLY";
STORE BI_SALESREPS_ANLY INTO D:\Qlikview_QVD_NEWDW\DW\BI_SALESREPS_ANLY.qvd (QVD);
drop table BI_SALESREPS_ANLY;
从上面可以看出,我加载完一个表后就把此表从内存中删除掉了,这样会释放出内存给后面的表来使用。
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