The error message you're seeing is because you're trying to create two foreign key constraints on the same column (FIELD_ID) referencing the same table (FIELD).

Here's how you can fix it:

1. Identify the constraints: In your CREATE TABLE statement, you have two constraints - FK_FIELD_ID and FK_FIELD_CONDITION_FIELD_ID. Both are trying to reference the FIELD_ID column in the FIELD table.

2. Determine the correct constraint: You need to decide which constraint is necessary for your table structure. If FIELD_ID in your CROP table is supposed to reference FIELD_ID in the FIELD table, you only need one foreign key constraint.

3. Remove the duplicate constraint: Once you've determined which constraint to keep, you can remove the other one.

Here's what your corrected SQL might look like:

```sql
CREATE TABLE CROP(
CROP_ID NUMBER PRIMARY KEY,
CROP_NAME VARCHAR2(100) NOT NULL,
PLANTING_DATE DATE NOT NULL,
FIELD_ID NUMBER NOT NULL,
CONSTRAINT FK_FIELD_ID FOREIGN KEY (FIELD_ID) REFERENCES FIELD(FIELD_ID)
);
```

In this corrected version, I've removed the FK_FIELD_CONDITION_FIELD_ID constraint. If you need to create another foreign key constraint, make sure it's on a different column or references a different table.

Question

The error message you're seeing is because you're trying to create two foreign key constraints on the same column (FIELD_ID) referencing the same table (FIELD).

Here's how you can fix it:

1. Identify the constraints: In your CREATE TABLE statement, you have two constraints - FK_FIELD_ID and FK_FIELD_CONDITION_FIELD_ID. Both are trying to reference the FIELD_ID column in the FIELD table.

2. Determine the correct constraint: You need to decide which constraint is necessary for your table structure. If FIELD_ID in your CROP table is supposed to reference FIELD_ID in the FIELD table, you only need one foreign key constraint.

3. Remove the duplicate constraint: Once you've determined which constraint to keep, you can remove the other one.

Here's what your corrected SQL might look like:

```sql
CREATE TABLE CROP(
    CROP_ID NUMBER PRIMARY KEY,
    CROP_NAME VARCHAR2(100) NOT NULL,
    PLANTING_DATE DATE NOT NULL,
    FIELD_ID NUMBER NOT NULL,
    CONSTRAINT FK_FIELD_ID FOREIGN KEY (FIELD_ID) REFERENCES FIELD(FIELD_ID)
);
```

In this corrected version, I've removed the FK_FIELD_CONDITION_FIELD_ID constraint. If you need to create another foreign key constraint, make sure it's on a different column or references a different table.

Knowee AI · Accepted Answer

The error message you're seeing is because you're trying to create two foreign key constraints on the same column (FIELD_ID) referencing the same table (FIELD).

Here's how you can fix it:

1. Identify the constraints: In your CREATE TABLE statement, you have two constraints - FK_FIELD_ID and FK_FIELD_CONDITION_FIELD_ID. Both are trying to reference the FIELD_ID column in the FIELD table.

2. Determine the correct constraint: You need to decide which constraint is necessary for your table structure. If FIELD_ID in your CROP table is supposed to reference FIELD_ID in the FIELD table, you only need one foreign key constraint.

3. Remove the duplicate constraint: Once you've determined which constraint to keep, you can remove the other one.

Here's what your corrected SQL might look like:

```sql
CREATE TABLE CROP(
    CROP_ID NUMBER PRIMARY KEY,
    CROP_NAME VARCHAR2(100) NOT NULL,
    PLANTING_DATE DATE NOT NULL,
    FIELD_ID NUMBER NOT NULL,
    CONSTRAINT FK_FIELD_ID FOREIGN KEY (FIELD_ID) REFERENCES FIELD(FIELD_ID)
);
```

In this corrected version, I've removed the FK_FIELD_CONDITION_FIELD_ID constraint. If you need to create another foreign key constraint, make sure it's on a different column or references a different table.

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