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月末

使用示例​

import com.youngdatafan.sqlbuilder.enums.DatabaseType;
import com.youngdatafan.sqlbuilder.enums.FunctionType;
import com.youngdatafan.sqlbuilder.model.Function;
import com.youngdatafan.sqlbuilder.model.Model;
import com.youngdatafan.sqlbuilder.model.Query;
import com.youngdatafan.sqlbuilder.model.Schema;
import com.youngdatafan.sqlbuilder.model.Table;

public class Test {

    @org.junit.Test
    public void getFunction() {
        Schema schema = Schema.getSchema("");
        Table test = Table.getOriginalTable(schema, "test", "t");
     
        Model date = test.addField("date");
        Query query = new Query();
        Function function = Function.getFunction(FunctionType.MONTH_END, date);
        query.addColumn("val", function);
        query.addFrom(test);
        System.out.println("oracle：");
        System.out.println(query.getDatabaseSql(DatabaseType.ORACLE));
        System.out.println();
       
        System.out.println("pg：");
        System.out.println(query.getDatabaseSql(DatabaseType.POSTGRESQL));
        System.out.println();
       
        System.out.println("clickhouse：");
        System.out.println(query.getDatabaseSql(DatabaseType.CLICKHOUSE));
        System.out.println();
       
        System.out.println("mysql：");
        System.out.println(query.getDatabaseSql(DatabaseType.MYSQL));
        System.out.println();
       
        System.out.println("sqlserver：");
        System.out.println(query.getDatabaseSql(DatabaseType.MSSQL));
        System.out.println();
       
        System.out.println("kdw：");
        System.out.println(query.getDatabaseSql(DatabaseType.KDW));
        System.out.println();
    }
}

根据数据源获取对于数据库的sql。

ORACLE​

SELECT last_day(t."date") AS "val" FROM "test" t

MYSQL​

SELECT LAST_DAY(t.`date`) AS `val` FROM `test` t

POSTGRESQL​

SELECT cast(((date_trunc( 'month', t.date) + INTERVAL '1 month' ) - INTERVAL '1 day' ) as date) AS val FROM test t

CLICKHOUSE​

SELECT subtractDays(addMonths(toStartOfMonth(t.date),1),1) AS val FROM test t

KDW​

SELECT cast(((date_trunc( 'month', t.date) + INTERVAL '1 month' ) - INTERVAL '1 day' ) as date) AS val FROM test t

SQLSERVER​

SELECT DATEADD(DAY,- 1,CONVERT ( date, CONVERT ( VARCHAR ( 8 ), DATEADD( MONTH, 1, t.date), 23 ) + '01' )) AS val FROM test t