Oracle分页：
SELECT
*
FROM
(
SELECT
a1.*, ROWNUM rn
FROM
(
SELECT
"t1".DATE_CREATED,
SUM ("t1".CHARGE_TIME) AS CHARGE_TIME,
SUM ("t1".CHARGING_CAPACITY) AS CHARGING_CAPACITY,
SUM ("t1".CHARGE_AMOUNT) AS CHARGE_AMOUNT,
MIN ("t1".PLATE_NUMBER) AS PLATE_NUMBER,
"t1".SELF_NUMBERING,
MIN ("t1".LINE) AS LINE,
MIN ("t1".FRAME_NUMBER) AS FRAME_NUMBER,
MIN ("t1".OWNER_NAME) AS OWNER_NAME
FROM
CHARGEPILE.V_CHARGE_BUS "t1"
WHERE
DATE_CREATED BETWEEN TO_DATE (
'2017-05-01',
'yyyy-mm-dd hh24:mi:ss'
)
AND TO_DATE (
'2017-05-31',
'yyyy-mm-dd hh24:mi:ss'
)
GROUP BY
"t1".DATE_CREATED,
"t1".SELF_NUMBERING
ORDER BY
MIN ("t1".OWNER_NAME) ASC,
MIN ("t1".LINE) ASC,
MIN ("t1".FRAME_NUMBER) ASC
) a1
WHERE
ROWNUM <= 15
)
WHERE
rn >= 1
Grails里面写SQL语句：
- 首先要知道需要在哪个数据源里面执行SQL，定义一个数据源
def dataSource
//查询数据的SQL
StringBuffer sql = new StringBuffer()
//用来分页查询数据条数的SQL
StringBuffer count = new StringBuffer()
//分页参数
Integer max = params.max ? params.int("max") : 15
Integer offset = params.offset ? params.int("offset") : 0
offset = offset / max + 1
if (offset == 0) {
offset = 1
}
Integer initial = (max * offset) - max + 1
Integer end = max * offset
if (count.size() == 0) {
count.append("SELECT\n" +
"\t\"COUNT\" (*)\n" +
"FROM\n" +
"\t(\n" +
"\t\tSELECT\n" +
"\t\t\t\"t1\".DATE_CREATED,\n" +
"\t\t\tSUM (\"t1\".CHARGE_TIME) AS CHARGE_TIME,\n" +
"\t\t\tSUM (\"t1\".CHARGING_CAPACITY) AS CHARGING_CAPACITY,\n" +
"\t\t\tSUM (\"t1\".CHARGE_AMOUNT) AS CHARGE_AMOUNT,\n" +
"\t\t\tMIN (\"t1\".PLATE_NUMBER) AS PLATE_NUMBER,\n" +
"\t\t\t\"t1\".SELF_NUMBERING,\n" +
"\t\t\tMIN (\"t1\".LINE) AS LINE,\n" +
"\t\t\tMIN (\"t1\".FRAME_NUMBER) AS FRAME_NUMBER,\n" +
"\t\t\tMIN (\"t1\".OWNER_NAME) AS OWNER_NAME\n" +
"\t\tFROM\n" +
"\t\t\tCHARGEPILE.V_CHARGE_BUS \"t1\"")
if (params.createStart && params.createEnd) {
count.append("WHERE\n" +
"\tDATE_CREATED BETWEEN TO_DATE (\n" +
"\t\t'" + params.createStart + "',\n" +
"\t\t'yyyy-mm-dd hh24:mi:ss'\n" +
"\t)\n" +
"AND TO_DATE (\n" +
"\t'" + params.createEnd + "',\n" +
"\t'yyyy-mm-dd hh24:mi:ss'\n" +
")" + " ")
}
//运营商查询
if (params.businessOwerName) {
count.append("AND ENTERPRISE_CODE = '" + params.businessOwerName + "'" + " ")
}
//线路查询
if (params.line) {
count.append("AND line = '" + params.line + "'" + " ")
}
if (params.vehPlate) {
count.append("AND PLATE_NUMBER='" + params.vehPlate + "'" + " ")
}
count.append("GROUP BY\n" +
"\t\t\t\"t1\".DATE_CREATED,\n" +
"\t\t\t\"t1\".SELF_NUMBERING\n" +
"\t)")
}
if (sql.size() == 0) {
sql.append("SELECT\n" +
"\t*\n" +
"FROM\n" +
"\t(\n" +
"\t\tSELECT\n" +
"\t\t\ta1.*, ROWNUM rn\n" +
"\t\tFROM\n" +
"\t\t\t(\n" +
"\t\t\t\tSELECT\n" +
"\t\t\t\t\t\"t1\".DATE_CREATED,\n" +
"\t\t\t\t\tSUM (\"t1\".CHARGE_TIME) AS CHARGE_TIME,\n" +
"\t\t\t\t\tSUM (\"t1\".CHARGING_CAPACITY) AS CHARGING_CAPACITY,\n" +
"\t\t\t\t\tSUM (\"t1\".CHARGE_AMOUNT) AS CHARGE_AMOUNT,\n" +
"\t\t\t\t\tMIN (\"t1\".PLATE_NUMBER) AS PLATE_NUMBER,\n" +
"\t\t\t\t\t\"t1\".SELF_NUMBERING,\n" +
"\t\t\t\t\tMIN (\"t1\".LINE) AS LINE,\n" +
"\t\t\t\t\tMIN (\"t1\".FRAME_NUMBER) AS FRAME_NUMBER,\n" +
"\t\t\t\t\tMIN (\"t1\".OWNER_NAME) AS OWNER_NAME\n" +
"\t\t\t\tFROM\n" +
"\t\t\t\t\tCHARGEPILE.V_CHARGE_BUS \"t1\"")
if (params.createStart && params.createEnd) {
sql.append("WHERE\n" +
"\tDATE_CREATED BETWEEN TO_DATE (\n" +
"\t\t'" + params.createStart + "',\n" +
"\t\t'yyyy-mm-dd hh24:mi:ss'\n" +
"\t)\n" +
"AND TO_DATE (\n" +
"\t'" + params.createEnd + "',\n" +
"\t'yyyy-mm-dd hh24:mi:ss'\n" +
")" + " ")
}
//运营商查询
if (params.businessOwerName) {
sql.append("AND ENTERPRISE_CODE = '" + params.businessOwerName + "'" + " ")
}
//线路查询
if (params.line) {
sql.append("AND line = '" + params.line + "'" + " ")
}
if (params.vehPlate) {
sql.append("AND PLATE_NUMBER='" + params.vehPlate + "'" + " ")
}
sql.append("GROUP BY\n" +
"\t\t\t\t\t\"t1\".DATE_CREATED,\n" +
"\t\t\t\t\t\"t1\".SELF_NUMBERING\n" +
"ORDER BY\n" +
"Min(\"t1\".OWNER_NAME) ASC,\n" +
"Min(\"t1\".LINE) ASC,\n" +
"Min(\"t1\".FRAME_NUMBER) ASC"+
"\t\t\t) a1\n" +
"\t\tWHERE\n" +
"\t\t\tROWNUM <= " + end + "\n" +
"\t)\n" +
"WHERE\n" +
"\trn >=" + initial)
}
def db = new groovy.sql.Sql(dataSource)
List vehInfoList = db.rows(sql.toString())
String str = db.firstRow(count.toString())
Integer counts = str.substring(str.indexOf("=") + 1, str.indexOf("}")).toInteger()
