feat: added stuff and corrected the schema creation.

db_schema.sql

@@ -1,17 +1,17 @@
-CREATE TABLE entities (
+CREATE TABLE IF NOT EXISTS entities (
     cik INT PRIMARY KEY,               -- CIK is now the primary key, ensuring uniqueness
     name VARCHAR(255) NOT NULL  -- Name of the company
 );
 
-CREATE TABLE facts (
+CREATE TABLE IF NOT EXISTS facts (
     id VARCHAR(255) PRIMARY KEY, -- Unique identifier for the fact
     taxonomy VARCHAR(255),       -- Taxonomy of the fact
     label VARCHAR(255),       -- Label of the fact
     description TEXT, -- Description of the fact
-    unit VARCHAR(255),           -- Unit of the fact
+    unit VARCHAR(255)           -- Unit of the fact
 );
 
-CREATE TABLE data (
+CREATE TABLE IF NOT EXISTS data (
     cik INT,                            -- CIK of the company
     fact_id VARCHAR(255),                 
     start DATE,                        -- Start date of the fact
@@ -23,7 +23,7 @@ CREATE TABLE data (
     form VARCHAR(255),
     filed DATE,
     frame VARCHAR(255),
-    PRIMARY KEY (cik, label)
+    PRIMARY KEY (cik, fact_id),
     FOREIGN KEY (cik) REFERENCES entities(cik),
     FOREIGN KEY (fact_id) REFERENCES facts(id)
 );