---
title: "SQL-VP-028: Retrieve period dates for a set of policy numbers"
summary: Retrieves policy-period, endorsement, and non-WCIS-period dates for a dynamic list of policy numbers via inline Oracle SQL.
status: draft
owner: SAIF Claims BOF team
last_reviewed: 2026-08-21
library: SAIF.Business.View.Policy
reference_type: embedded
---

# SQL-VP-028 Retrieve period dates for a set of policy numbers

Used by `clsAssociationTypeCode.GetPeriodDates()` (`PeriodDateSQL`) to resolve period dates when
grouping policies for experience/discount-combination association types.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-VP-028 |
| **Operation type** | Read |
| **Execution method** | Inline SQL (`String.Format`-composed `IN (...)` list) |
| **Database** | Oracle |
| **Schema** | `[unqualified]**` |
| **Command type** | Text |
| **Business object** | `clsAssociationTypeCode` |
| **Criteria property** | `GetPeriodDates()` (ad hoc static/shared method) |
| **Lifecycle method** | ad hoc static/shared method |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| policy-number list (`{0}`) | Input | `String.Format` `IN ({0})` substitution | N/A | Comma-separated list of policy numbers, composed internally (not raw user input) rather than passed as a bind parameter.* |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [POLICY_PERIOD_ALL](../database-tables.md#policy_period_all) | SELECT / JOIN | `POLICY_NUM`, `POLICY_PERIOD_ALL_ID`, `POLICY_PERIOD_EFF_DATE`, `POLICY_PERIOD_EXP_DATE` |
| [ENDORSEMENT](../database-tables.md#endorsement) | LEFT JOIN | `POLICY_PERIOD_ALL_ID`, `ENDORSEMENT_EFF_DATE` |
| [POLICY_PERIOD_NON_WCIS](../database-tables.md#policy_period_non_wcis) | LEFT JOIN | `POLICY_PERIOD_ALL_ID`, `POLICY_PERIOD_NON_WCIS_ID` |

## Sample SQL

```sql
SELECT
  POLICY_PERIOD_ALL.POLICY_NUM,
  POLICY_PERIOD_ALL.POLICY_PERIOD_EFF_DATE,
  POLICY_PERIOD_ALL.POLICY_PERIOD_EXP_DATE,
  ENDORSEMENT.ENDORSEMENT_EFF_DATE,
  POLICY_PERIOD_NON_WCIS.POLICY_PERIOD_NON_WCIS_ID
FROM
  POLICY_PERIOD_ALL
  LEFT JOIN ENDORSEMENT
    ON POLICY_PERIOD_ALL.POLICY_PERIOD_ALL_ID = ENDORSEMENT.POLICY_PERIOD_ALL_ID
  LEFT JOIN POLICY_PERIOD_NON_WCIS
    ON POLICY_PERIOD_ALL.POLICY_PERIOD_ALL_ID = POLICY_PERIOD_NON_WCIS.POLICY_PERIOD_ALL_ID
WHERE
  POLICY_PERIOD_ALL.POLICY_NUM IN ({0})
```

*The `{0}` placeholder is substituted via `String.Format` with a comma-separated list of policy
numbers (not raw free-text user input), then executed as `CommandType.Text`; exact join columns are
inferred from typical `POLICY_PERIOD_ALL` schema naming conventions and were not verbatim-confirmed
against the live constant text.**

> **Note:** Statements marked with `*` were inferred from code structure, naming
> conventions, or contextual evidence where direct confirmation was not available
> in source artifacts. Statements marked with `**` could not be confirmed; treat
> as unknown until verified.

## Sources
- `SAIF.Business.View.Policy\Associations\clsAssociationTypeCode.vb`