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## WIKI-文档
### 1、[从零开始OHDSI](http://www.ohdsi.org/web/wiki/doku.php?id=documentation:getting_started)
1) 第一步将自己的数据[导成](http://www.ohdsi.org/web/wiki/doku.php?id=documentation:etl_best_practices) OMOP…
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**Describe the problem**
PCR tests source codes in gold are:
37310282 | 1240581000000104 | Severe acute respiratory syndrome coronavirus 2 detected | Clinical Finding | Non-standard | Val…
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**Issue Name** Representation of Advance Directives
**Issue Type:** Lack of an ETL convention for a CDM table and/or field, ways to store source data in the OMOP CDM to represent an idea of interes…
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I do not think I have the permissions to issue a CREATE TABLE statement in the same cluster we store our CDM.
```
USE _MyDatabaseName_
SELECT permission_name, state_desc FROM sys.database_permissi…
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# How to store family history in the OBSERVATION table
## CDM or THEMIS convention?
CDM
## Table or Field level?
Table
## Is this a general convention?
No
## Summary of issues
1. If these is an es…
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Why doesn't the DDL for Microsoft SQL Server use a clustered primary key? Why does it instead use an index that is essentially a duplicate of the primary key, thereby using up more resources (storage…
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The bradycardia instantiation cohort portion of the package is hanging for me under PostgreSQL for my MDCR MarketScan database but not my CCAE MarketScan database. It has been running 9 hours on the …
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Hi there!
I've been playing around trying to get the DDLs loaded for sqlite3, version 5.4 using the `sqlite3` command line and I've been having a pretty rough go of it using the provided definition…
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@mvankessel-EMC it would be nice if targetCohorts, eventCohorts, and exitCohorts were allowed to be in different tables in the cdm. This would provide some more flexibility in the analysis, as we may …
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A recent [forum post](https://forums.ohdsi.org/t/osm-vocabulary/16303/7) highlighted the issue that some vocabularies are set to "required" and as such will be always part of a download bundle / canno…