@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) public @interface Column
Column annotation is specified, the default values apply.
 
    Example 1:
    @Column(name="DESC", nullable=false, length=512)
    public String getDescription() { return description; }
    Example 2:
    @Column(name="DESC",
            columnDefinition="CLOB NOT NULL",
            table="EMP_DETAIL")
    @Lob
    public String getDescription() { return description; }
    Example 3:
    @Column(name="ORDER_COST", updatable=false, precision=12, scale=2)
    public BigDecimal getCost() { return cost; }
 | Modifier and Type | Optional Element and Description | 
|---|---|
| String | columnDefinition(Optional) The SQL fragment that is used when 
 generating the DDL for the column. | 
| boolean | insertable(Optional) Whether the column is included in SQL INSERT 
 statements generated by the persistence provider. | 
| int | length(Optional) The column length. | 
| String | name(Optional) The name of the column. | 
| boolean | nullable(Optional) Whether the database column is nullable. | 
| int | precision(Optional) The precision for a decimal (exact numeric) 
 column. | 
| int | scale(Optional) The scale for a decimal (exact numeric) column. | 
| String | table(Optional) The name of the table that contains the column. | 
| boolean | unique(Optional) Whether the column is a unique key. | 
| boolean | updatable(Optional) Whether the column is included in SQL UPDATE 
 statements generated by the persistence provider. | 
public abstract String name
public abstract boolean unique
UniqueConstraint annotation at the table 
 level and is useful for when the unique key constraint 
 corresponds to only a single column. This constraint applies 
 in addition to any constraint entailed by primary key mapping and 
 to constraints specified at the table level.public abstract boolean nullable
public abstract boolean insertable
public abstract boolean updatable
public abstract String columnDefinition
Defaults to the generated SQL to create a column of the inferred type.
public abstract String table
public abstract int length
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